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Networking Questions And Answers Sample Test 10


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Networking Test 10


You have scored 3 out of 10
You Scored:2
Total Questions:2
Attended Questions:2
Correct Answered:2
1.
Which encapsulations can be configured on a serial interface?

Ethernet
Token Ring
HDLC
Frame Relay
PPP



Explanation:

Ethernet and Token Ring are LAN technologies and cannot be configured on a serial interface. PPP, HDLC, and Frame Relay are layer 2 WAN technologies that are typically configured on a serial interface.


2.
Which of the following services use UDP?

DHCP
SMTP
SNMP
FTP
HTTP
TFTP



Explanation:

DHCP, SNMP, and TFTP use UDP.


3. Which command would you place on interface on a private network?



Explanation:

As in access-lists, you must configure your interfaces before NAT will provide any translations. On the inside networks you would use the command ip nat inside. On the outside interface, you will use the command ip nat outside.


4.      Which of the following is true regarding RIPv2?



Explanation:

RIPv2 is pretty much just like RIPv1. It has the same administrative distance and timers and is configured just like RIPv1.


5. The configuration register setting of 0x2102 provides what function to a router?



Explanation:

The default configuration setting of 0x2102 tells the router to look in NVRAM for the boot sequence.


6.
  Which are considered the methods of NAT?

Static
IP NAT pool
Dynamic
NAT double-translation
Overload



Explanation:

You can configure NAT three ways on a Cisco router: static, dynamic, and NAT Overload (PAT).


7. Which of the following commands sets a trunk port on a 2960 switch?



Explanation:

To set a switch port to trunk mode, which allows all VLAN information to pass down the link, use the switchport mode trunk command.


8. You connect a host to a switch port, but the new host cannot log into the server that is plugged into the same switch. What could the problem be?



Explanation:

This question is a little vague, but the best answer is that the VLAN membership for the port is not configured.


9. What is the maximum data rate for the 802.11b standard?



Explanation:

The IEEE 802.11b standard provides a maximum data rate of up to 11Mbps.


10. What is the maximum distance running the lowest data rate for 802.11b?



Explanation:

The IEEE 802.11b standard provides the lowest data rate at 1Mbps, but it also has the longest distance, which is about 350 feet.


11.
Which of the following describe router functions?



Explanation:

Routers provide packet switching, packet filtering, internetwork communication, and path selection.


12. Which of the following allows a router to respond to an ARP request that is intended for a remote host?



Explanation:

Proxy ARP can help machines on a subnet reach remote subnets without configuring routing or a default gateway.


13.
Which of the following provide inter-switch VLAN communication?

ISL
VTP
802.1Q
802.3Z



Explanation:

ISL is a Cisco-proprietary frame-tagging method. IEEE 802.1Q is the nonproprietary version of frame tagging.


14. What flavor of Network Address Translation can be used to have one IP address allow many users to connect to the global Internet?



Explanation:

Port Address Translation (PAT) allows a one-to-many approach to network address translation.


15. What multicast addresses does EIGRPv6 use?



Explanation:

EIGRPv6's multicast address stayed very near the same. In IPv4 it was 224.0.0.10; now it is FF02::A (A=10 in hexadecimal notation).


16.
Which statement is true regarding classless routing protocols?

The use of discontiguous networks is not allowed.
The use of variable length subnet masks is permitted.
RIPv1 is a classless routing protocol.
IGRP supports classless routing within the same autonomous system.
RIPv2 supports classless routing.



Explanation:

Classful routing means that all hosts in the internetwork use the same mask. Classless routing means that you can use Variable Length Subnet Masks (VLSMs) and can also support discontiguous networking.


17.
   What does RIPv2 use to prevent routing loops?
CIDR
Split horizon
Authentication
Classless masking
Holddown timers



Explanation:

RIPv2 uses the same timers and loop-avoidance schemes as RIPv1. Split horizon is used to stop an update from being sent out the same interface it was received on. Holddown timers allow time for a network to become stable in the case of a flapping link.


18. You want to create a standard access list that denies the subnet of the following host: 172.16.144.17/21. Which of the following would you start your list with?



Explanation:

First, you must know that a /21 is 255.255.248.0, which is a block size of 8 in the third octet. Counting by eight, this makes our subnet 144 in the third octet, and the wildcard for the third octet would be 7 since the wildcard is always one less than the block size.


19. Which of the following is considered to be the address before translation?



Explanation:

The host on the private network before translation is considered to be an inside local host.


20. Which command would you place on interface connected to the Internet?



Explanation:

As in access-lists, you must configure your interfaces before NAT will provide any translations. On the inside networks you would use the command ip nat inside. On the outside interface, you will use the command ip nat outside.


21.
Network 206.143.5.0 was assigned to the Acme Company to connect to its ISP. The administrator of Acme would like to configure one router with the commands to access the Internet. Which commands could be configured on the Gateway router to allow Internet access to the entire network?

Gateway(config)# ip route 0.0.0.0 0.0.0.0 206.143.5.2
Gateway(config)# router rip
Gateway(config-router)# network 206.143.5.0
Gateway(config-router)# network 206.143.5.0 default



Explanation:

There are actually three different ways to configure the same default route, but only two are shown in the answer. First, you can set a default route with the 0.0.0.0 0.0.0.0 mask and then specify the next hop, as in option A. Or you can use 0.0.0.0 0.0.0.0 and use the exit interface instead of the next hop. Finally, you can use option D with the ip default-network command.


22. Which of the following is a layer 2 protocol used to maintain a loop-free network?



Explanation:

The Spanning Tree Protocol is used to stop switching loops in a switched network with redundant paths.


23.
If you want to have more than one Telnet session open at the same time, what keystroke combination would you use?



Explanation:

To keep open one or more Telnet sessions, use the Ctrl+Shift+6 and then X keystroke combination.


24. You need to create an access list that will prevent hosts in the network range of 192.168.160.0 to 192.168.191.0. Which of the following lists will you use?



Explanation:

The range of 192.168.160.0 to 192.168.191.0 is a block size of 32. The network address is 192.168.160.0 and the mask would be 255.255.224.0, which for an access list must be a wildcard format of 0.0.31.255. The 31 is used for a block size of 32. The wildcard is always one less than the block size.


25. What command is used to create a backup configuration?



Explanation:

The command to back up the configuration on a router is copy running-config startup-config.


26.
Which WAN encapsulations can be configured on an asynchronous serial connection?

PPP
ATM
HDLC
SDLC
Frame Relay



Explanation:

Please do not freak out because ATM is an answer to this question. ATM is not covered in depth on the CCNA exam. PPP is mostly used for dial-up (async) services, but ATM could be used as well, though it typically is not used anymore since PPP is so efficient.


27. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?



Explanation:

A receiving host can control the transmitter by using flow control (TCP uses Windowing by default). By decreasing the window size, the receiving host can slow down the transmitting host so the receiving host does not overflow its buffers.


28. Which of the following describes an industry-wide standard suite of protocols and algorithms that allows for secure data transmission over an IP-based network that functions at the layer 3 Network layer of the OSI model?



Explanation:

IPSec is an industry-wide standard suite of protocols and algorithms that allows for secure data transmission over an IP-based network that functions at the layer 3 Network layer of the OSI model.


29. Which of the following is true regarding VTP?



Explanation:

All Cisco switches are VTP servers by default. No other VTP information is configured on a Cisco switch by default. You must set the VTP domain name on all switches to be the same domain name or they will not share the VTP database.


30. When creating a pool of global addresses, which of the following can be used instead of the netmask command?



Explanation:

Instead of the netmask command, you can use the prefix-length <length> statement.




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