思科认证考试（ＣＣＮＡ）考试模拟题０１—１９及答案(4)
添加时间: 2007-9-3 22:06:05 作者: Cisco认证考试 阅读次数:135 来源: http://www.d9soft.com
ICMP mask replies are never sent
IP fast switching is enabled
IP fast switching on the same
interface is disabled
IP multicast fast switching is enabled
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is
disabled
TCP/IP header compression is disabled
Probe proxy name replies are disabled
Gateway Discovery is disabled
Policy routing is disabled
Network address translation is disabled
5. [CxNx] Which of the following commands will display the contents of the ARP cache of your Cisco router?
a) show ip arp cache
b) show ip route
c) show ip arp
d) show arp
e) there is no way to display the ARP cache
Answer
c) show ip arp
Example:
Router_A#sh ip arp
Protocol Address Age(min) Hardware Address Type Interface
Internet 1.1.1.2 - 0010.7b15.bd50 ARPA FastEthernet1/0
Internet 10.10.10.1 - 0010.7b15.bd41 ARPA Ethernet0/0
6. [CxNx] Reverse Address Resolution Protocol (RARP) is the process:
a) Where an IP host resolves it’s IP address by broadcasting it’s MAC address to the network and a BOOTP server assigns it an IP address.
b) Where an IP host resolves it’s MAC address by broadcasting to the local network it’s IP address.
c) Where an IP host tries to resolve the MAC address of a destination by sending a network broadcast. The destination responds to the broadcast with it’s MAC address.
d) Where an IP host resolves a destination IP address by sending a broadcast on the local network and the destination host responds with it’s IP address.
e)There is no such process.
Answer
a) Where an IP host resolves it’s IP address by broadcasting it’s MAC address to the network and a BOOTP server assigns it an IP address.
Choice C describes Address Resolution Protocol (ARP). A host never has to resolve it’s own MAC address. The MAC address is burned into the Network Interface card. When the host is booted the MAC address will be loaded into memory.
7. [OxNx] Which of the following applications requires the connection-oriented layer four protocol, TCP? (Choose all that apply)
a) Telnet
b) FTP
c) TFTP
d) SNMP
e) none of the above
Answer
a) Telnet
b) FTP
TFTP and SNMP use layer 4 UDP.
8. [RxNx] Which of the following are link state Routing Protocols.
(Choose all that apply.)
a) IP
b) OSPF
c) RIP
d) EIGRP
e) IS-IS
Answer
b) OSPF
e) IS-IS
A link state routing protocol advertises, to it’s neighbors, the state of the link when the state of the link changes.
A distance vector routing protocol advertises its routing table periodically.
9. [CxNx] Of the following commands, identify the correct one for clearing the IP arp table in memory of the router.
a) clear ip arp-cache
b) clear ip arp-table
c) clear arp-cache
d) clear arp-table
e) clear arp-ram
Answer
c) clear arp-cache
If you have changed an ip address or a NIC card on a host you might use this command to reset the cache.
10. [CxNx] Which of the following explains the correct definition of administrative distance as it pertains to Cisco’s IOS?
a) The process by which routers select an administrator for an autonomous system.
b) The process where a router will select the best path to a destination network.
c) The process where a router will distance itself from other routers due to it’s lack of administrative experience.
d) The process where a router will prioritize routing protocols so that in the event two routing protocols have conflicting next hop addresses, the routing protocol with the lowest administrative distance will take priority.
e) The process where a router will prioritize routing protocols so that in the event two routing protocols have conflicting next hop addresses, the routing protocol with the highest administrative distance will take priority.
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