CCNABRAINDUMP6(2)
添加时间: 2007-9-6 2:28:43 作者: Cisco考试认证 阅读次数:45 来源: http://www.d9soft.com
A. sh ip int
B. sh ip access-list
C. sh access-list 169
D. sh access-list 169 extended
11) What is a benefit of segmenting your network with switches? (Choose all that apply)
A. Each port on a switch acts like a router interface
B. Switches provide bridging functionality at wire speed
C. Regenerates the digital signal at each hop
D. Stop broadcast storms
12) CIDR is a technique supported by BGP4 and based on route aggregation.
CIDR allows routers to group routes together in order to cut down on
the quantity of routing information carried by the core routers. With
CIDR, several IP networks appear to networks outside the group as a
single, larger entity.
What does CIDR stand for?
a) C-class inter-domain routing
b) Classfull inter-domain routing
c) Classless internet domain routing
d) Classless inter-domain routing
13) Which of the following are concerns in regards to link-state routing
protocols and scalability?
1) Heavy memory, processing and bandwidth requirements.
2) Slow convergence.
3) Problems with segmentation and unsynchronized updates.
4) High number of routing loops.
14) Link state routing protocols send routing information to all nodes in
the internetwork. Also, routers send only that portion of the routing
table that describes the state of it's own links. In addition, a
link-state algorithm maintains full knowledge of distant routers and
how they interconnect.
Which one of the following is an interior, link-state protocol that
partitions an autonomous system (AS) into logical areas? (choose one)
a) RIP
b) EGP
c) OSPF
d) IGRP
15) Count to infinity is a problem that may occur in routing algorithms
that are slow to converge, in which routers continuously increment the
hop count to particular networks.
Which technique used to solve count to infinity, assigns an infinite
cost to an inaccessible route?
a) Hop count
b) Holddowns
c) Split horizon
d) Poison reverse
16) What is the command to show you both source and destination dlci's in one command.
a) show frame-relay route
b) show frame-relay dlci
c) show frame-relay int dlci
d) show frame-relay
17) What is the default holdtime for CDP information?
a) 30 seconds
b) 60 seconds
c) 90 seconds
d) 180 seconds
18) Type the command to instruct the router to load the IOS from Read Only Memory?
a) Load system rom
b) boot system rom
c) run rom
d) boot system default
19) Which of the following statements are true?
a) Store and forward switching creates variable latency through the switch
b) Cut through switching creates variables latency through the switch
c) Store and forward switching works at wire speed
d) Cut through switching works at wire speed
20) What two occurrences will reset the holddown timer after a triggered update?
a) HD Timer expires
b) Infinity is finally defined as some max number
c) Another update is received indicating net status changed
d) Another update is received indicating a better metric
e) The router receives a processing task proportional to the number of links in the internetwork
f) The router detects fault LSP’s propagating through the internetwork
21) What command displays IPX routing update packets received or transmitted between a router
a) Sh ipx route
b) Sh table ipx
c) Disp ipx routing activity
d) Debug ipx routing activity
22) Which is true regarding half duplex Ethernet operation?
a) Half Duplex ethernet technology provides a transmit circuit connection wired directly to the receiver circuit at the other end
b) Half Duplex transmission between stations is achieved using Point to Point Ethernet & Fast Ethernet
c) With Half Duplex transmission logically circuits feed into a single cable creating a situation similar to a one way bridge
d) Half duplex transmission between stations is achieved by using point to multipoint Ethernet and Fast Ethernet
23) What statement is true about the Message of the Day (MOTD)
a) MOTD banners are displayed at login
b) You must start a motd banner with a delimiting character of your choice
c) The banner motd command is used to add a description to a specific interface
d) The interface description command must end with a delimiting character
24) Which of the following are presentation layer standards ( choose 3)?
a) Ascii & EBCDIC
b) NFS & SQL
c) PICT & JPEG
d) RPC
e) MIDI & Mpeg
25) Which of the following is a session layer protocols?
a) Ascii & EBCDIC
b) SQL
c) PICT & JPEG
d) RPC
f) MIDI & Mpeg
26) What output would the following commands give the output:
ROUTER#_____
Ambigous Command "CL"
a) CL -?
b) Help CL
c) CL?
d) ? CL
e) CL ?
27) Which types of serial communications are characterized by PVC and layer 2 identifiers ?
a) Frame relay
b) X.25
c) PPP
d) SLIP
28) What is the syntax for the enable banner command?
a) Router (config)# banner motd #
b) Router (config)# motd
c) Router (config)# set motd .
29) What key stokes will bring you back to the beginning of the command line?
a) Ctrl A
b) Ctrl B
c) Ctrl P
d) Ctrl N
30) What command would you use to set the clock rate to 56k?
a) Clock rate 56
b) Clock rate 56000
c) Set Clock-rate 56
d) Clockrate 56000
31) What is the command to set the encapsulation to ppp on a serial interface?
a) Switch-type ppp
b) Protocol ppp
c) encapsulation ppp
d) enable ppp
32) What are the 2 functions of the data link Mac layer?
a) Handles access to shared media
b) Provides SAPs for higher level protocols
c) Allows multiple devices to uniquely identify one another on the data link layer
d) Manages protocol access to the physical network medium
34) What does the IPX maximum path command do?
a) Sets the maximum metric that can appear in the routing table
b) Configures round robin load sharing over multiple equal metric paths
(parallel paths)
c) Allows you to disable the TTL on an IPX packet
d) This parameter is only used in NLSP routing.
35) Which IP-class provides the least number of Hosts?
a) Class A
b) Class B
c) Class C
d) Class D
36) What are the three ways to display IPX interface e0 ?
a) sh ipx int e0
b) sh ipx interface e0
c) sh ipx interface ethernet0
d) sh int
37) How to change the Enable Secret password to CCNA ?
Router(config)# enable secret CCNA
38) How to change the Enable password to CCNP ?
Router(config)# enable password CCNP
39) How to change the Virtual Terminal password to CCIE ?
Router(config)# line vty 0 4
Router(config-line)# login
Router(config-line)# password CCIE
40) How to change the Auxiliary password to Cisco ?
Router(config)# line aux 0
Router(config-line)# login
Router(config-line)# password Cisco
41) How to change the Console password to Cisco ?
Router(config)# line con 0
Router(config-line)# login
Router(config-line)# password Cisco
42) How are the ISDN protocols defined ?
I stands for concepts, terminology and services
E stands for existing telephone network
Q stands for switching and signaling
43) What are the correct encapsulation type of frame-relay ?
Cisco (default)
IETF
44) How to monitor Frame-relay activity on a Cisco router ?
show interface s0
show frame-relay map
45) What are the five steps of Encapsulation?
1) User information is converted to data.
2) Data is converted to segments.
3) Segments are converted to packets or datagrams.
4) Packets or datagrams are converted to frames.
5) Frames are converted to bits.
46) What kind of services are provided by the Presentation layer ?
JPEG, TIFF, PICT, EBCDIC to ASCII, MIDI, MPEG, QuickTime
47) What kind of services are provided by the Session layer ?
NFS, SQL, RPC, X Windows, ASP, DNA SCP
48) How to define access-list commands ?
wrong: Router(config-if)# access-list 1 permit 172.16.20.1 0.0.0.0
right: Router(config) # access-list 1 permit 172.16.20.1 0.0.0.0
The access list will be defined at global level, not at the interface level. It's a small but important detail. The access group command will be defined at interface level:
Router(config) # int e0
Router(config-if) # access-group 1 out
49) What are the access-list ranges of IP (standard and extended) ?
1-99 IP standard access list
100-199 IP extended access list
know also:
600-699 Appletalk access list
800-899 IPX standard access list
900-999 IPX extended access list
1000-1099 IPX SAP access list
50) What happens to a packet which receives the end of an access list ?
There is an implicit deny any at the end of an access list. So if the
packet is not allowed, it will be dropped.
51) Which command is used to view the access-list on serial0 interface ?
show access-lists s0
52) How many access-lists are possible on an interface per protocol ?
There can be only one access list for in and one for out on each interface per protocol.
53) What is the FrameRelay configuration command for the second subinterface ?
interface s0.2 point-to-point
interface s0.2 multipoint
54) A ISDN BRI circuit can be described as ---------
2B+1D (B=64kbps ; D=16kbps)
55) Which of the following is true about ISDN?
a) ISDN provides end-to-end digital connectivity
b) A 54kbps line i much faster than 2 B channels
c) ISDN provides Voice and Data
d) ISDN provides data only
56) Which of the following is true about ISDN?
a) ISDN provides end-to-end digital connectivity
b) 2 B channels are much faster than a 54 kbps line
c) ISDN provides Voice only
d) ISDN provides Data only
57) Which of the following is true abou the IP address 209.76.25.1 ?
a) IP network ID is 209.76.25.0 and host ID is 0.0.0.1
b) IPX network ID is 209.76.25.0 and host ID is 0.0.0.1
d) Appletalk network ID is 209.76.25.0 and host ID is 0.0.0.1
e) IP host ID is 209.76.25.0 and network ID is 0.0.0.1
58) Which of the following is true about IPX address 4a.0000.0c00.23f3?
a) IP network ID is 4a and host ID is 0000.0c00.23fe
b) IPX network ID is 4a and host ID is 0000.0c00.23fe
c) Appletalk network ID is 4a and host ID is 0000.0c00.23fe
59) Which command to turn off enhanced editing ?
a) TERMINAL NO EDITING
b) TERMINAL EDITING
c) NO TERMINAL EDITING
d) TERMINAL EDITING OFF
60) Which command to see the hostname?
a) show hostnames
b) show hostnames 0
c) show hosts
d) show interface
Hi Folks,
Just passed CCNA with 869 points few hours ago.
The exam had 78 questions and the usual format where going back was not allowed. I was quiet surprised to get only one or two direct question on source.
In fact the whole was on exam was on OSI and terminology. About 10 to 15 questions were on IOS commands.
The command questions were mainly on IPX, Frame Relay and Access list.
The wordings differed quiet from other practice exams.
On the whole the exam was straight without any complicated and tricky questions.
The materials that I used are :
CCNA Study Guide and Study Notes from Sybex
ICRC from Cisco Press
Boson Test version 2.4
Few study notes from different sources on the web.
Practiced with my Cisco 803 router
I am attaching a my study note which I compiled from different sources on the web.
I would like to thank all the great people who are responsible for this very useful site.
Best Regards,
Arman
OSI Model
Application
File, print, message, database, and applications
Determines availability of the target host.
www, email, ftp, telnet, edi, quake (SMTP & DNS ?)
Presentation
Data Encryption, compression, and translation services
Determines the syntax of the data transfer.
Pict, tiff, jpet, midi, mpeg, quicktime, etc
Session
Dialog control, coordinates the comunications
Nfs, sql, rpc, x windows, asp (appletalk session protocol), DNA SCP
(digital whatzit)
Transport
End-to-end communication
Responsible for hiding the communications from the higher layers.
TCP / UDP
Network
Routing
IP / ICMP, BootP, ARP, RARP
Routers
Data Link
Framing
Ethernet II, 802.5 (token ring), 802.3, 802.2 (802.3 with dsap and ssap
logical link control fields)
Media access control: MAC: 48 bits, 3 bytes vendor + 3 bytes serial
number
WAN:
High-level datalink control HDLC (cisco default for serial links)
Synchronous Data Link Control SDLC (uses polling)
Link Access Procedure, Balanced LAPB
x.25, slip, ppp, isdn, Frame Relay
Bridges / Switches
Physical
Wire…
v.24, v.35, x.21, g.703, hssi, etc
Repeaters / Hubs
DOD Model
Process/application à application, presentation, session
Host-to-host à transport
Internet à network
Network access à Datalink / physical
LAN
Ethernet
802.3 CSMA/CD Ethernet_II 802.2
10base2/thinnet: 185 meters
10base5/thicknet: 500 meters
10baseT: can run above 10Mbps 200ish meters
5-4-3 rule: 5 segments, 4 repeaters, 3 segments populated
100BaseTX: 100 meters, up to 2 repeaters. Packets between 512 and
1518.
FDDI
100 Mbps
token passing with dual counter-rotating rings
Token-ring
802.5
4 / 16 Mbps
ATM
53-byte cells
Flow Control
Contention: CSMA/CD : Carrier Sense Multiple Access, Collision Detect
Token Passing: Token Ring, Fiddi
Polling: SDLC, some HDLC, some HP ethernet stuff
SWITCHING
Store – and – forward
Buffers whole frame before forwarding
Cut-Through
Forward frame as soon as destination address is available
Fragment Free
Does Cut-Through after 64 bytes are received to stop collision packets
from being forwarded.
802.1d Spanning-Tree Protocol STP
detect and eliminates loops in routed network
STA: Spanning Tree Algorithm
Sends out BPDUs: Bridge protocol data units
VLAN: Virtual Lans
Create ‘logical’ networks by location, function or department.. or
protocol, or whatever.
Done with a switch using Frame-Tagging (can be used between switches if
you have ISL inter-switch link) Frame-Tagging uses unique user-defined
identifiers while within the switch fabric, and is very scalable.
TCP/IP
Port numbers:
TCP: protocol number 6
ftp: 21
telnet: 23
smtp: 25
UDP: protocol number 17
Dns: 53
Tftp: 69
Snmp: 161
0-255: public assigned
256 – 1023: assigned to companies
1023+ user defined / source addresses
IP Addressing:
Class leading bits decimal range of first byte
A 0 1-127
B 10 128-191
C 100 192-223
Learn the rest of the stuff…. Way out of scope of this.
NOTE:
Cisco considers the mask to be the bits beyond what is ‘normal’ for that
class address, not the entire number of bits in the subnet mask,
sometimes….
IPX
Protocl Stack:
Application, presentation, session à RIP, SAP, NCP, NLSP, etc…
Transport à IPX, SPX
Network à IPX
Data link à ODL Open Data Link
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