CiscoCCNA考试56题(2)
添加时间: 2007-9-3 22:59:40 作者: Cisco认证考试 阅读次数:66 来源: http://www.d9soft.com
6. Which command would configure Interface E0 with an IP address of 12.23.4.5 using a Subnet mask of 255.255.255.0 ? A.) that is an invalid mask for a class ’A’ address B.) ip address 12.23.4.5 /24 C.) ip address 12.23.4.5 255.255.255.0 D.) ip address 12.23.4.5 mask 255.255.255.0 E.) ip address 12.23.4.5 mask ff:ff:ff:0
C You can change the way the mask is displayed (bitcount, decimal, hex) but you must enter the subnet mask in dotted decimal. Router(config-if)#ip address 12.23.4.5 ? A.B.C.D IP subnet mask
7. Given the IP address 148.90.109.120 with a mask 255.255.255.240. Which subnet is this address on? A.) 148.90.109.96 B.) 148.90.109.128 C.) 148.90.109.0 D.) 148.90.109.112 E.) 148.90.109.64 F.) 148.90.109.116
D With a mask of 255.255.255.240, it should be recognizable that the subnet is 148.90.109.?, the last octet is the hard part. Magic Number = 256 - subnet mask Magic Number = 256 - 240 = 16 Subnets are multiples of the magic number: 16,32,48,64,80,96,112,128,144…. As close to 113 without going over is .. 112 So the answer is 148.90.109.112.
8. The host address: ’’5C.0000.0ca1.4567’ Is valid for which protocol stack? A.) SNA B.) Decnet C.) Chaos D.) IP E.) Appletalk F.) IPX
F
9. Given the following static route command, ip route 3.3.3.0 255.255.255.0 4.4.4.4 125, which portion represents the TCP/IP destination network? A.) 4.4.4.4 B.) route C.) 255.255.255.0 D.) 3.3.3.0 E.) 125
D
10. The Physical layer works with which of the following: A.) Segments B.) Globules C.) Frames D.) Packets E.) Bits
E
11. Which commands will restart the router? A.) system restart B.) restart C.) shutdown system D.) reload E.) down F.) system exit
D
12. Which of the following are examples of the Session Layer? (2 answers) A.) SQL B.) TCP C.) NFS D.) Token Ring E.) LLC
A C Controls mechanisms such as checkpoints, terminations, and restarts to establish, maintain, and synchronize communications between applications. Examples: SQL, RFC, RPC, X-Windows, NetBIOS Names 13. Which command will display the Data Link Connection Identifiers (DLCI’s)? (2 answers) A.) show version B.) show connection C.) show frame-relay pvc D.) show dlci E.) show running-config
C E For ’show frame-relay pvc’ the permanent virtual circuit (PVC) descriptions also include the DLCI numbers. Note: ’show unning-config’ will only display DLCIs if the frame-relay MAP statement is used for multi-point interfaces or if you use sub-interfaces. If you are using inverse-arp it will not show up in the running config.
14 The Datalink Layer is broken down into 2 layers, LLC and MAC. The LLC establishes media independence and what else?(2 Ans) A.) RIP Updates. B.) The Datalink layer does not have sublayers. C.) Provides SAP’s (Service Advertising Protocol). D.) Provides Windowing. E.) Provides flow control. F.) Provides SAP’s (Service Access Points).
E F OSI layer-2 SAP allows the upper layers to encapsulate multiple layer 3 protocols. IPX SAP is a protocol used to advertise NetWare services every 60 seconds.
15. Which of the following is an example of the Network Layer? A.) IPX B.) LLC C.) SPX D.) Token Ring E.) SQL
A
16. When calculating valid host address for TCP/IP, the host bits can not be all 1’s or all 0’s. Which of the following is an invalid host address, using the subnet mask 255.255.255.192 ? A.) 200.1.1.161 B.) 200.1.1.127 C.) 200.1.1.65 D.) 200.1.1.66 E.) 200.1.1.129
B In binary, mask .192 = 11000000 and host .127 = 01111111. For 200.1.1.127, all of the host bits are 1’s using that mask. Router(config-if)#ip address 200.1.1.127 255.255.255.192 Bad mask /26 for address 200.1.1.127
17. Novell NetWare has an Ethernet frame type called Ethernet_II. What is the matching Cisco command line keyword for this encapsulation method? A.) gns B.) snap C.) arpa D.) novell-ether E.) sap F.) dix
C
18 When setting up a frame-relay network between a Cisco router and a non-Cisco router, what encapsulation type should you use? A.) SAP B.) CISCO C.) Q933A D.) IANA E.) IETF F.) Apollo
E
19 In regards to TCP/IP, which class of address allows for the fewest valid Internet hosts? A.) A B.) Classes are not used in TCP/IP. C.) E D.) D E.) C F.) B
E
20. Which of the following are characteristics of UDP? (5 answers) A.) UDP is at the transport layer. B.) UDP is connectionless. C.) UDP is unreliable. D.) UDP is used with TFTP. E.) UDP uses no acknowledgements. F.) UDP is connection oriented.
A B C D E
21 When determining whether or not to route a LAN segment, which rule of thumb do you use? A.) 70/30 B.) 80/20 C.) 60/40 D.) 50/50 E.) 90/10
A The industry standard rule is 80/20, which means 80% local, 20% over the router. However, according to Cisco’s online documentation, the answer is 70/30. This makes sense, considering more and more traffic is starting to go from the desktop to an ulimate destination outside the local are network, such as the Internet.
22. For IPX, what is the DEFAULT Cisco Encapsulation on an Ethernet interface? A.) dix B.) sap C.) gns D.) arpa E.) novell-ether F.) snap
E
23 Which command will display the IPX routing table? A.) show routes protocol=ipx B.) show ipx C.) show ipx route D.) show routes ipx E.) show routes
C
24 Which of the following are examples of the Transport Layer? (2 Answers) A.) TCP B.) Token Ring C.) IP D.) UDP E.) LLC F.) SQL
A D
25 Which command allows a user to see previous commands? (3 answers) A.) show command B.) CTRL-U C.) SHIFT-CTRL-6 D.) CTRL-P E.) show history F.) Up Arrow
D E F
26. You would like to back up an image of the IOS file that is currently on your router. You have a Window 95 machine running a tftp-server program. Assuming that you have network connectivity between the router and the tftp-server, what is the command to backup the IOS to the Windows 95 machine running tftp? A.) write flash B.) copy tftp flash C.) tftp flash: D.) write enable E.) ftp flash: F.) copy flash tftp
F
27 The Internet Protocol (IP) occurs at what layer of the seven layer model? A.) Transport B.) Presentation C.) Physical D.) Datalink E.) Network F.) Session
E IP is a routed protocol that occurs at layer 3. Other layer 3 protocols include IPX, APPLETALK, and DECNET.
28. A user device that connects to a DCE must be which of the following? A.) Demarc B.) CPE C.) DTE D.) CO E.) DCE
C DTE’s are the router side, and receive clocking. DCE’s are the DSU/CSU side, and provide clocking.
29 Which of the following will allow for 14 hosts per subnet on network 200.1.1.0 ? (3 answers) A.) 200.1.1.0 255.255.255.240 B.) 200.1.1.0 with 4 bits of subnetting C.) 200.1.1.0 255.255.255.248 D.) 200.1.1.0 with 5 bits of subnetting E.) 200.1.1.0 /27 F.) 200.1.1.0 /28
A B F There are multiple ways to represent that you need 28 bits of subnetting. Shorthand /28 = 4 bits = 255.255.255.240 decimal. Shortcut: You need 4 bits for the host because 2^4 - 2 = 14 Magic Number Alternate Method ------------------- Magic Numbers are powers of 2. For Example: 2,4,8,16,32,64,128 The number of hosts on a subnet is two less than the magic number. To get 14 hosts, the magic number would need to be 16.
256-magic number = interesting octect of subnet mask 256- 16 =240 So mask is 255.255.255.240
30. What is a characteristic of Store and Forward switches? A.) They work at wire speed. B.) They forward the frame before it is completely read. C.) They are the same as Cut-Through switching in ’prune’ mode. D.) They increase latency. E.) They forward based on transport layer info. D 31. The network portion of an address typically represents a: A.) Router B.) Computer C.) Ethernet MAC address. D.) Segment E.) Host
D Every network segment is represented by a network or subnetwork address.
32 Which device listed below provides clocking for the line? A.) DTE B.) CO C.) DCE D.) Demarc E.) CPE
C The Data Circuit-terminating Equipment (DCE) is responsible for providing the clocking on the wire. HINT: When You see the ’C’ in ’DCE’, think ’Clocking’
33. How do you set the encapsulation type to PPP for an interface? A.) ppp ietf B.) encapsulation ppp C.) ppp enable D.) ppp cisco E.) enable ppp
B
34 What would the command ’TERMINAL NO EDITING’ do? A.) Nothing. B.) Turn exec mode off. C.) Prevent terminal configuration. D.) Turn off enhanced editing. E.) Prevents update to RAM.
D
35 How do you view the routers current processor utilization? A.) show cpu B.) show startup-config C.) show version D.) show utilization E.) show running-config F.) show processes cpu
F Router#sh processes cpu CPU utilization for five seconds: 2%/2%; one minute: 1%; five minutes: 0%
36 Which Standard IP Access list commands will deny only the source address 1.1.1.1? A.) access-list 9 permit 1.1.1.1 255.255.255.0 B.) access-list 9 permit any C.) access-list 9 deny 1.1.1.1 0.0.0.0 D.) access-list 9 permit 1.1.1.1 0.255.255.255 E.) access-list 9 deny 1.1.1.1 255.255.255.255
C A 0.0.0.0 wildcard mask means check every bit and make sure that it matches. For our example, the IP host address 1.1.1.1 is a specific address to check on the network. An alternative would be to use the IP network address and a special access-list wildcard mask to check an entire subnetwork.
37 What should be the first command to create an extended access-list that denies host 1.1.1.1 from telnetting anywhere? A.) access-list 10 deny tcp host 1.1.1.1 any eq 20 B.) access-list 10 deny tcp host 1.1.1.1 any eq 22 C.) access-list 10 deny tcp host 1.1.1.1 any eq 23 D.) None of the above are correct. E.) access-list 10 deny tcp host 1.1.1.1 any eq 24 F.) access-list 10 deny tcp host 1.1.1.1 any eq 21
D This was a trick question. Extended access-lists for TCP/IP must be in the range 100-199. Watch those access-list numbers!
38 There are 2 types of PPP authentication supported by the Cisco IOS. What are they? (2 Answers) A.) STACKER B.) CHAP C.) Kermit D.) PREDICTOR E.) PAP F.) MD5
B E
39 What type of switching creates variable latency through the switch? A.) Multiplexed B.) Cut-Through C.) Layer 4 D.) Store and Forward E.) Inverted
D DEFINITION: Latency = Delay.Because a store and forward switch reads the whole frame before forwarding, a larger frame takes longer than a shorter frame.
40. Given the global configuration commands: ’banner motd #’ ’Hello #’ When would the message be displayed? A.) Message of the day banners are not possible. B.) The message of the day banner shows up before login. C.) These commands are not the right syntax for MOTD. D.) Message of the day banners are displayed upon entering global config mode. E.) The message of the day banner shows up during logoff. F.) The message of the day would be, ’Hello #’
B
41 Which command enables frame relay on a router’s interface? A.) map wan type=7 B.) encapsulation frame-relay C.) frame-relay enable D.) interface frame-relay E.) cisco encap F.) enable frame-relay
B
42 Which subnet is the host 200.1.1.99 /27 on? A.) 200.1.1.0 B.) 200.1.1.96 C.) 200.1.1.128 D.) 200.1.1.64 E.) 200.1.1.16
B The shorthand notation /27 = 3 bits in the last octet = decimal 255.255.255.224 Shortcut: 256 - 224 = 32. Valid subnets are multiples of 32 (32,64,96,128, etc). Shortcut #2: Because it’s a small slice and a big number, who wants to count up every 32 digits to find the next subnetwork address? Just divide 99 / 32 = 3 times. Now, take 3 x 32 slices = 96, so 99 is on the network 96.
43 Which command will start the process for a Cisco IOS file image upgrade? A.) network B.) copy tftp flash C.) download flash D.) copy flash tftp E.) download B 44 Which of the following would be displayed by the command ’SHOW CDP NEIGHBOR DETAIL’? (4 answers) A.) Amount of Flash Memory Available B.) The routers hostname. C.) One address per protocol. D.) The subnet mask, if IP is configured. E.) The hardware platform. F.) The incoming/outgoing port.
B C E F CDP shows a lot of the same info that ’show version’ does locally, but FLASH memory is not part of it. The ’detail’ keyword is optional, but even when used, IP subnet mask information is not displayed by CDP for IP interfaces.
45 What is the access-list wild card mask to match the range 100.1.16.0 - 100.1.31.255 ? A.) 0.0.15.255 B.) 0.0.7.255 C.) 0.0.31.255 D.) 0.31.255.255 E.) 0.0.255.255
A Access-list wildcard masks are the inverse of subnet masks. Shortcut: Take the the broadcast and subtract from the network. 100.1.31.255 - 100.1.16.0 ---------------- 0.0.15.255
46 The Cisco Discovery Protocol (CDP) periodically sends out a multicast packet (at layer 2). Which command will alter the default interval of 60 seconds? A.) cdp 111 B.) cdp hold 111 C.) cdp timer 111 D.) cdp wait 111 E.) cdp interval 111
C
47 What command would configure a Cisco router to ’Round Robin Load Balance’ over paths of equal metric? A.) IPX Round-Robin B.) IPX RIP C.) IPX NLSP D.) There is no such thing as ’Round Robin Load Balance’. E.) IPX GNS-Round-Robin F.) IPX Maximum-paths
F
48 What does the parameter -- LOG -- do on an IPX access list? A.) Logs the creation of the access list. B.) Logs IPX access control list violations whenever a packet matches a particular access list entry. C.) Ensures the IPX protocol places a log in the fireplace. D.) The log keyword is not a valid option. E.) Read the LOG to figure out what traffic to deny.
B
49 After the command -- router rip -- what command would enable RIP on the router for interface E0, with an address of 157.89.4.4 and mask of 255.255.255.0 ? A.) network 157.89.0.0 B.) router rip 157.89.4.0 C.) router rip int e0 D.) router rip 157.89.0.0 E.) router rip * F.) network 157.89.4.0 255.255.255.0
A RIPv1 cannot use subnet mask information. RIPv1 can only use the classful network portion, which in this case is a class B. So for our example, RIP can only enumerate the ’157.89’ part. All interfaces in that network will be processed.
50 Which command will enable debugging for IPX RIP updates? A.) debug ipx packets B.) debug ipx rip C.) debug ipx D.) debug rip E.) debug ipx routing activity
E
51 What is the correct command line syntax for configuring a port on a 7000 or 7500 series Cisco router with a VIP card? A.) port adapter/port B.) slot C.) slot/port-adapter/port D.) slot/port E.) You can’t put a VIP card in a 7000 or 7500 router. F.) port
C The VIP cards have a port adapter, so you must also specify them as well. The syntax for a VIP card is: ’Interface Serial SLOT/PORT-ADAPTER/PORT’, where: Slot = The big linecard slot # in the 7500 chassis, Port-Adapter = The PA mini-card slot # inside the larger linecard slot, Port = The interface port # on the PA mini-card. Imagine a larger slot (the linecard slot of the chassis) that in turn has two additional smaller slots for mini-cards (the VIP PA slots).
52 Which of the following describe SMTP? (2 Answers) A.) Used for managing IP devices. B.) Uses ICMP C.) Uses TCP. D.) Used for downloading files to the router. E.) Uses UDP. F.) Used for sending e-mail.
C F Send / Simple (depending on literature) Mail Transport Protocol (SMTP) is used for delivering mail to other mail servers. It uses port 25, and relies on TCP.
53 What are the valid Host ID’s for 161.37.2.50 /28 (12 bits of subnetting)? A.) 161.37.2.49 - 161.37.2.63 B.) 161.37.0.0 - 161.37.255.254 C.) 161.37.2.48 - 161.37.2.63 D.) 161.37.2.0 - 161.37.2.254 E.) 161.37.2.49 - 161.37.2.62
E Below is a very easy to use shortcut that requires no binary math: Figure out the mask: /28 = 255.255.255.240 Figure out the subnet multiple: 256-240=16 Subnets are: 16,32,48,64,80, etc This is subnet 48, the next subnet is 64, so the broadcast address is 63. Everything between the subnet (48) and broadcast (63) are the valid hosts. In this example, based on the given mask, the valid host ranges are 49-62.
54 Which layer of the 7 layer model provides services to the Application layer over the Session layer connection? A.) Transport B.) Presentation C.) Session D.) Network E.) Application F.) Datalink
B
55 Which OSI Reference Layer controls application to application communication? A.) Transport B.) Session C.) Physical D.) Network E.) Datalink
B The Session layer controls a conversation between applications. The Transport layer controls communications between hosts.
56 There is an emergency fall-back ’skeleton’ IOS stored in read only memory on all Cisco routers. What command would make the router load the IOS from Read Only Memory? A.) load ios rom B.) bootsystem skeleton C.) boot system rom D.) load ios bootflash E.) reload rom
C
1. Which ISDN specification deals with call Setup and Teardown? A.) J-Series B.) F-Series C.) Q-Series D.) I- Series E.) World Series
C The 2 most important ISDN specifications are Q & I: Q = Call setup and teardown. I = Concepts and terminology.
2. Which command will set a routers network name to ’myrouter’? A.) network name myrouter B.) display myrouter C.) hostname myrouter D.) name myrouter E.) network myrouter
C
3. When a Distance Vector routing protocol detects that a connected network has gone down, it sends out a special routing update packet, telling all directly connected routers that the distance to the dead network is infinity. This is an example of which routing technology? A.) Only Link State routing protocols have this intelligence. B.) Poison Reverse. C.) Triggered updates. D.) Garrison-4. E.) ICMP. F.) Split Horizon.
B Instead of just removing the route from the routing update, Poison Reverse sets the distance to ’infinity’ (for IP RIP this is a hop count of 16). This immediately makes the route invalid for all neighboring routers.
4 What is the standard ISDN term for a native ISDN modem? A.) TE3 B.) ET C.) LE D.) TE2 E.) TA
E The marketing term ’ISDN modem’ was created to help sell the ISDN idea to America. There is no such thing as an analog modulator demodulator for digital ISDN. The Terminal Adapter (TA) allows you to connect a PC to a digital ISDN line directly. In the real world, ISDN is digital, modems are analog.
5 Which of the following are Transport layer protocols? (3 answers) A.) NFS B.) SPX C.) UDP D.) TCP E.) IP
B C D
6. Which command would configure Interface E0 with an IP address of 12.23.4.5 using a Subnet mask of 255.255.255.0 ? A.) that is an invalid mask for a class ’A’ address B.) ip address 12.23.4.5 /24 C.) ip address 12.23.4.5 255.255.255.0 D.) ip address 12.23.4.5 mask 255.255.255.0 E.) ip address 12.23.4.5 mask ff:ff:ff:0
C You can change the way the mask is displayed (bitcount, decimal, hex) but you must enter the subnet mask in dotted decimal. Router(config-if)#ip address 12.23.4.5 ? A.B.C.D IP subnet mask
7. Given the IP address 148.90.109.120 with a mask 255.255.255.240. Which subnet is this address on? A.) 148.90.109.96 B.) 148.90.109.128 C.) 148.90.109.0 D.) 148.90.109.112 E.) 148.90.109.64 F.) 148.90.109.116
D With a mask of 255.255.255.240, it should be recognizable that the subnet is 148.90.109.?, the last octet is the hard part. Magic Number = 256 - subnet mask Magic Number = 256 - 240 = 16 Subnets are multiples of the magic number: 16,32,48,64,80,96,112,128,144…. As close to 113 without going over is .. 112 So the answer is 148.90.109.112.
8. The host address: ’’5C.0000.0ca1.4567’ Is valid for which protocol stack? A.) SNA B.) Decnet C.) Chaos D.) IP E.) Appletalk F.) IPX
F
9. Given the following static route command, ip route 3.3.3.0 255.255.255.0 4.4.4.4 125, which portion represents the TCP/IP destination network? A.) 4.4.4.4 B.) route C.) 255.255.255.0 D.) 3.3.3.0 E.) 125
D
10. The Physical layer works with which of the following: A.) Segments B.) Globules C.) Frames D.) Packets E.) Bits
E
11. Which commands will restart the router? A.) system restart B.) restart C.) shutdown system D.) reload E.) down F.) system exit
D
12. Which of the following are examples of the Session Layer? (2 answers) A.) SQL B.) TCP C.) NFS D.) Token Ring E.) LLC
A C Controls mechanisms such as checkpoints, terminations, and restarts to establish, maintain, and synchronize communications between applications. Examples: SQL, RFC, RPC, X-Windows, NetBIOS Names 13. Which command will display the Data Link Connection Identifiers (DLCI’s)? (2 answers) A.) show version B.) show connection C.) show frame-relay pvc D.) show dlci E.) show running-config
C E For ’show frame-relay pvc’ the permanent virtual circuit (PVC) descriptions also include the DLCI numbers. Note: ’show unning-config’ will only display DLCIs if the frame-relay MAP statement is used for multi-point interfaces or if you use sub-interfaces. If you are using inverse-arp it will not show up in the running config.
14 The Datalink Layer is broken down into 2 layers, LLC and MAC. The LLC establishes media independence and what else?(2 Ans) A.) RIP Updates. B.) The Datalink layer does not have sublayers. C.) Provides SAP’s (Service Advertising Protocol). D.) Provides Windowing. E.) Provides flow control. F.) Provides SAP’s (Service Access Points).
E F OSI layer-2 SAP allows the upper layers to encapsulate multiple layer 3 protocols. IPX SAP is a protocol used to advertise NetWare services every 60 seconds.
15. Which of the following is an example of the Network Layer? A.) IPX B.) LLC C.) SPX D.) Token Ring E.) SQL
A
16. When calculating valid host address for TCP/IP, the host bits can not be all 1’s or all 0’s. Which of the following is an invalid host address, using the subnet mask 255.255.255.192 ? A.) 200.1.1.161 B.) 200.1.1.127 C.) 200.1.1.65 D.) 200.1.1.66 E.) 200.1.1.129
B In binary, mask .192 = 11000000 and host .127 = 01111111. For 200.1.1.127, all of the host bits are 1’s using that mask. Router(config-if)#ip address 200.1.1.127 255.255.255.192 Bad mask /26 for address 200.1.1.127
17. Novell NetWare has an Ethernet frame type called Ethernet_II. What is the matching Cisco command line keyword for this encapsulation method? A.) gns B.) snap C.) arpa D.) novell-ether E.) sap F.) dix
C
18 When setting up a frame-relay network between a Cisco router and a non-Cisco router, what encapsulation type should you use? A.) SAP B.) CISCO C.) Q933A D.) IANA E.) IETF F.) Apollo
E
19 In regards to TCP/IP, which class of address allows for the fewest valid Internet hosts? A.) A B.) Classes are not used in TCP/IP. C.) E D.) D E.) C F.) B
E
20. Which of the following are characteristics of UDP? (5 answers) A.) UDP is at the transport layer. B.) UDP is connectionless. C.) UDP is unreliable. D.) UDP is used with TFTP. E.) UDP uses no acknowledgements. F.) UDP is connection oriented.
A B C D E
21 When determining whether or not to route a LAN segment, which rule of thumb do you use? A.) 70/30 B.) 80/20 C.) 60/40 D.) 50/50 E.) 90/10
A The industry standard rule is 80/20, which means 80% local, 20% over the router. However, according to Cisco’s online documentation, the answer is 70/30. This makes sense, considering more and more traffic is starting to go from the desktop to an ulimate destination outside the local are network, such as the Internet.
22. For IPX, what is the DEFAULT Cisco Encapsulation on an Ethernet interface? A.) dix B.) sap C.) gns D.) arpa E.) novell-ether F.) snap
E
23 Which command will display the IPX routing table? A.) show routes protocol=ipx B.) show ipx C.) show ipx route D.) show routes ipx E.) show routes
C
24 Which of the following are examples of the Transport Layer? (2 Answers) A.) TCP B.) Token Ring C.) IP D.) UDP E.) LLC F.) SQL
A D
25 Which command allows a user to see previous commands? (3 answers) A.) show command B.) CTRL-U C.) SHIFT-CTRL-6 D.) CTRL-P E.) show history F.) Up Arrow
D E F
26. You would like to back up an image of the IOS file that is currently on your router. You have a Window 95 machine running a tftp-server program. Assuming that you have network connectivity between the router and the tftp-server, what is the command to backup the IOS to the Windows 95 machine running tftp? A.) write flash B.) copy tftp flash C.) tftp flash: D.) write enable E.) ftp flash: F.) copy flash tftp
F
27 The Internet Protocol (IP) occurs at what layer of the seven layer model? A.) Transport B.) Presentation C.) Physical D.) Datalink E.) Network F.) Session
E IP is a routed protocol that occurs at layer 3. Other layer 3 protocols include IPX, APPLETALK, and DECNET.
28. A user device that connects to a DCE must be which of the following? A.) Demarc B.) CPE C.) DTE D.) CO E.) DCE
C DTE’s are the router side, and receive clocking.DCE’s are the DSU/CSU side, and provide clocking.
29 Which of the following will allow for 14 hosts per subnet on network 200.1.1.0 ? (3 answers) A.) 200.1.1.0 255.255.255.240 B.) 200.1.1.0 with 4 bits of subnetting C.) 200.1.1.0 255.255.255.248 D.) 200.1.1.0 with 5 bits of subnetting E.) 200.1.1.0 /27 F.) 200.1.1.0 /28
A B F There are multiple ways to represent that you need 28 bits of subnetting. Shorthand /28 = 4 bits = 255.255.255.240 decimal. Shortcut: You need 4 bits for the host because 2^4 - 2 = 14 Magic Number Alternate Method ------------------- Magic Numbers are powers of 2. For Example: 2,4,8,16,32,64,128 The number of hosts on a subnet is two less than the magic number. To get 14 hosts, the magic number would need to be 16.
256-magic number = interesting octect of subnet mask 256- 16 =240 So mask is 255.255.255.240
30. What is a characteristic of Store and Forward switches? A.) They work at wire speed. B.) They forward the frame before it is completely read. C.) They are the same as Cut-Through switching in ’prune’ mode. D.) They increase latency. E.) They forward based on transport layer info. D
31. The network portion of an address typically represents a: A.) Router B.) Computer C.) Ethernet MAC address. D.) Segment E.) Host
D Every network segment is represented by a network or subnetwork address.
32 Which device listed below provides clocking for the line? A.) DTE B.) CO C.) DCE D.) Demarc E.) CPE
C The Data Circuit-terminating Equipment (DCE) is responsible for providing the clocking on the wire. HINT: When You see the ’C’ in ’DCE’, think ’Clocking’
33. How do you set the encapsulation type to PPP for an interface? A.) ppp ietf B.) encapsulation ppp C.) ppp enable D.) ppp cisco E.) enable ppp
B
34 What would the command ’TERMINAL NO EDITING’ do? A.) Nothing. B.) Turn exec mode off. C.) Prevent terminal configuration. D.) Turn off enhanced editing. E.) Prevents update to RAM.
D
35 How do you view the routers current processor utilization? A.) show cpu B.) show startup-config C.) show version D.) show utilization E.) show running-config F.) show processes cpu
F Router#sh processes cpu CPU utilization for five seconds: 2%/2%; one minute: 1%; five minutes: 0%
36 Which Standard IP Access list commands will deny only the source address 1.1.1.1? A.) access-list 9 permit 1.1.1.1 255.255.255.0 B.) access-list 9 permit any C.) access-list 9 deny 1.1.1.1 0.0.0.0 D.) access-list 9 permit 1.1.1.1 0.255.255.255 E.) access-list 9 deny 1.1.1.1 255.255.255.255
C A 0.0.0.0 wildcard mask means check every bit and make sure that it matches. For our example, the IP host address 1.1.1.1 is a specific address to check on the network. An alternative would be to use the IP network address and a special access-list wildcard mask to check an entire subnetwork.
37 What should be the first command to create an extended access-list that denies host 1.1.1.1 from telnetting anywhere? A.) access-list 10 deny tcp host 1.1.1.1 any eq 20 B.) access-list 10 deny tcp host 1.1.1.1 any eq 22 C.) access-list 10 deny tcp host 1.1.1.1 any eq 23 D.) None of the above are correct. E.) access-list 10 deny tcp host 1.1.1.1 any eq 24 F.) access-list 10 deny tcp host 1.1.1.1 any eq 21
D This was a trick question. Extended access-lists for TCP/IP must be in the range 100-199. Watch those access-list numbers!
38 There are 2 types of PPP authentication supported by the Cisco IOS. What are they? (2 Answers) A.) STACKER B.) CHAP C.) Kermit D.) PREDICTOR E.) PAP F.) MD5
B E
39 What type of switching creates variable latency through the switch? A.) Multiplexed B.) Cut-Through C.) Layer 4 D.) Store and Forward E.) Inverted
D DEFINITION: Latency = Delay.Because a store and forward switch reads the whole frame before forwarding, a larger frame takes longer than a shorter frame.
40. Given the global configuration commands: ’banner motd #’ ’Hello #’ When would the message be displayed? A.) Message of the day banners are not possible. B.) The message of the day banner shows up before login. C.) These commands are not the right syntax for MOTD. D.) Message of the day banners are displayed upon entering global config mode. E.) The message of the day banner shows up during logoff. F.) The message of the day would be, ’Hello #’
B
41 Which command enables frame relay on a router’s interface? A.) map wan type=7 B.) encapsulation frame-relay C.) frame-relay enable D.) interface frame-relay E.) cisco encap F.) enable frame-relay
B
42 Which subnet is the host 200.1.1.99 /27 on? A.) 200.1.1.0 B.) 200.1.1.96 C.) 200.1.1.128 D.) 200.1.1.64 E.) 200.1.1.16
B The shorthand notation /27 = 3 bits in the last octet = decimal 255.255.255.224 Shortcut: 256 - 224 = 32. Valid subnets are multiples of 32 (32,64,96,128, etc). Shortcut #2: Because it’s a small slice and a big number, who wants to count up every 32 digits to find the next subnetwork address? Just divide 99 / 32 = 3 times. Now, take 3 x 32 slices = 96, so 99 is on the network 96.
43 Which command will start the process for a Cisco IOS file image upgrade? A.) network B.) copy tftp flash C.) download flash D.) copy flash tftp E.) download B 44 Which of the following would be displayed by the command ’SHOW CDP NEIGHBOR DETAIL’? (4 answers) A.) Amount of Flash Memory Available B.) The routers hostname. C.) One address per protocol. D.) The subnet mask, if IP is configured. E.) The hardware platform. F.) The incoming/outgoing port.
B C E F CDP shows a lot of the same info that ’show version’ does locally, but FLASH memory is not part of it. The ’detail’ keyword is optional, but even when used, IP subnet mask information is not displayed by CDP for IP interfaces.
45 What is the access-list wild card mask to match the range 100.1.16.0 - 100.1.31.255 ? A.) 0.0.15.255 B.) 0.0.7.255 C.) 0.0.31.255 D.) 0.31.255.255 E.) 0.0.255.255
A Access-list wildcard masks are the inverse of subnet masks. Shortcut: Take the the broadcast and subtract from the network. 100.1.31.255 - 100.1.16.0 ---------------- 0.0.15.255
46 The Cisco Discovery Protocol (CDP) periodically sends out a multicast packet (at layer 2). Which command will alter the default interval of 60 seconds? A.) cdp 111 B.) cdp hold 111 C.) cdp timer 111 D.) cdp wait 111 E.) cdp interval 111
C
47 What command would configure a Cisco router to ’Round Robin Load Balance’ over paths of equal metric? A.) IPX Round-Robin B.) IPX RIP C.) IPX NLSP D.) There is no such thing as ’Round Robin Load Balance’. E.) IPX GNS-Round-Robin F.) IPX Maximum-paths
F
48 What does the parameter -- LOG -- do on an IPX access list? A.) Logs the creation of the access list. B.) Logs IPX access control list violations whenever a packet matches a particular access list entry. C.) Ensures the IPX protocol places a log in the fireplace. D.) The log keyword is not a valid option. E.) Read the LOG to figure out what traffic to deny.
B
49 After the command -- router rip -- what command would enable RIP on the router for interface E0, with an address of 157.89.4.4 and mask of 255.255.255.0 ? A.) network 157.89.0.0 B.) router rip 157.89.4.0 C.) router rip int e0 D.) router rip 157.89.0.0 E.) router rip * F.) network 157.89.4.0 255.255.255.0
A RIPv1 cannot use subnet mask information. RIPv1 can only use the classful network portion, which in this case is a class B. So for our example, RIP can only enumerate the ’157.89’ part. All interfaces in that network will be processed.
50 Which command will enable debugging for IPX RIP updates? A.) debug ipx packets B.) debug ipx rip C.) debug ipx D.) debug rip E.) debug ipx routing activity
E
51 What is the correct command line syntax for configuring a port on a 7000 or 7500 series Cisco router with a VIP card? A.) port adapter/port B.) slot C.) slot/port-adapter/port D.) slot/port E.) You can’t put a VIP card in a 7000 or 7500 router. F.) port
C The VIP cards have a port adapter, so you must also specify them as well. The syntax for a VIP card is: ’Interface Serial SLOT/PORT-ADAPTER/PORT’, where: Slot = The big linecard slot # in the 7500 chassis, Port-Adapter = The PA mini-card slot # inside the larger linecard slot, Port = The interface port # on the PA mini-card. Imagine a larger slot (the linecard slot of the chassis) that in turn has two additional smaller slots for mini-cards (the VIP PA slots).
52 Which of the following describe SMTP? (2 Answers) A.) Used for managing IP devices. B.) Uses ICMP C.) Uses TCP. D.) Used for downloading files to the router. E.) Uses UDP. F.) Used for sending e-mail.
C F Send / Simple (depending on literature) Mail Transport Protocol (SMTP) is used for delivering mail to other mail servers. It uses port 25, and relies on TCP.
53 What are the valid Host ID’s for 161.37.2.50 /28 (12 bits of subnetting)? A.) 161.37.2.49 - 161.37.2.63 B.) 161.37.0.0 - 161.37.255.254 C.) 161.37.2.48 - 161.37.2.63 D.) 161.37.2.0 - 161.37.2.254 E.) 161.37.2.49 - 161.37.2.62
E Below is a very easy to use shortcut that requires no binary math: Figure out the mask: /28 = 255.255.255.240 Figure out the subnet multiple: 256-240=16 Subnets are: 16,32,48,64,80, etc This is subnet 48, the next subnet is 64, so the broadcast address is 63. Everything between the subnet (48) and broadcast (63) are the valid hosts. In this example, based on the given mask, the valid host ranges are 49-62.
54 Which layer of the 7 layer model provides services to the Application layer over the Session layer connection? A.) Transport B.) Presentation C.) Session D.) Network E.) Application F.) Datalink
B
55 Which OSI Reference Layer controls application to application communication? A.) Transport B.) Session C.) Physical D.) Network E.) Datalink
B The Session layer controls a conversation between applications. The Transport layer controls communications between hosts.
56 There is an emergency fall-back ’skeleton’ IOS stored in read only memory on all Cisco routers. What command would make the router load the IOS from Read Only Memory? A.) load ios rom B.) bootsystem skeleton C.) boot system rom D.) load ios bootflash E.) reload rom
C
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