思科认证考试（ＣＣＮＡ）考试模拟题０１—１９及答案

Below are questions 1-19. To see an explanation for each question, please refer to the explanation link below the question or select explanations on the navigation bar to the left.
Questions
1. [OxNx] During a TFTP transfer using Cisco Routers what is the numeric value, in decimal, of the destination port field of the User Datagram Protocol (UDP) header?

a) 96
b) 47
c) a random number above 1024
d) 69
e) none of the above

2. [CxNx] What is the standard encapsulation method used by Cisco routers for the Internet Protocol (IP) on it’s Ethernet interfaces?
a) SNAP
b) ARPA
c) NOVELL-ETHER
d) DARPA
e) Ethernet_802.3

3. [CxNx] What will be the correct command on a Cisco router to set the IP address of an interface assuming you are at the "router(config-if)#" prompt?
a) ip address 1.1.1.1 255.255.255.0
b) ip address 1.1.1.1
c) ip 1.1.1.1
d) ip 1.1.1.1 255.255.255.0
e) none of the above

4. [CxNx] Which commands will display the IP addresses of all interfaces on a Cisco Router? (Choose all that apply)
a) show ip route
b) show ip address
c) show ip interface
d) show interface
e) display ip addresses

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

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.

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

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

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

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.