Networking Multiple Choice Questions and Answers (MCQ)

Networking Multiple Choice Questions and Answers (MCQ)

Question 1. Where would a router boot from if a configuration register was set to 0x0101?

A.Flash

B.ROM

C.Boot ROM

D.NVRAM

Answer 1.

B. The configuration register is used to tell the router how to load the IOS and configuration. The value 0x0101 tells the router to boot from ROM. 

Question 2.What is the correct command to set the router identification to the name Atlanta, which an administrator would see when connecting with Telnet or through the console?

A.Description Atlanta Router

B.Banner Motd $

C.Hostname Atlanta

D.Host name Atlanta

E.Set prompt Atlanta

Answer 2.

C. The command hostname (one word) is used to set the name of the router.

Question 3. Which of the following is the valid host range for the IP address 192.168.168.188 255.255.255.192?
A. 192.168.168.129–190
B. 192.168.168.129–191
C. 192.168.168.128–190
D. 192.168.168.128–192

Answer 3.
A. Start by using 256, the subnet mask, which is 256–192=64. The first subnet is 64. The next subnet would be 128. This host is in the128 subnet, the broadcast address is 191, and the valid host range is 129 through 190.

Question 4.What are the access list numbers used for IP standard access lists?
A.1–10
B.1–99
C.100–199
D.1000–1999

Answer 4.
B. Standard IP access lists use the numbers 1–99. 

Question 5.If you type show interface serial 0 and receive the following response, what could the problem be?
RouterA#sh int s0
Serial0 is up, line protocol is down

A. The keepalives could be set wrong between the point-to-point links.
B.  No cable is attached to the interface.
C. The administrator needs to issue a no shutdown request to the interface.
D. The interface is defective.

Answer 5.
A. If you see the line is up, but the protocol is down, you are having a clocking (keepalive) or framing issue. Check the keepalives on both ends to make sure they match; the clock rate is set, if needed; and the encapsulation type is the same on both ends.

Question 6.How do you create a default route?
A.By using all 1s in place of the network and mask
B.By defining a static route and using all 0s in place of the network and mask
C.By using 255 in place of the network and mask
D.Login <name, password>

Answer 6.
B. Default routes are created by using all 0s in place of the network and mask IDs.

Question 7.What is a trunked link?
A.A link that is only part of one VLAN and is referred to as the native VLAN of the port
B.A link that can carry multiple VLANs
C.A switch port connected to the Internet
D.Data and voice capability on the same interface

Answer 7.
B. Trunked links carry multiple VLANs across the same link.

Question 8.Which protocol is used to look up an IP address from a known Ethernet address?
A.IP
B.ARP
C.RARP
D.TCP

Answer 8.
C. The protocol at the Network layer that finds an IP address from a known Ethernet address is Reverse ARP (RARP).

Question 9.What is the broadcast address of the subnet address 192.168.99.20 255.255.255.252?
A.192.168.99.127
B.192.168.99.63
C.192.168.99.23
D.192.168.99.31

Answer 9.
C. Start by using 256, the subnet mask, which is 256–25=4. The first subnet is 4. The next subnet would be 8, then 12, 16, 20, and 24. The broadcast address is 23, and the valid host range is 21 and 22.

Question 10.What is the valid host range that the host ID 192.168.10.33 255.255.255.224 is a part of?
A.192.168.10.32–63
B.192.168.10.33–63
C.192.168.10.33–62
D.192.168.10.33–61

Answer 10.
C. Start by using 256, the subnet mask, which is 256–224=32. The first subnet is 10.32. The next subnet would be 10.64. This host is in
the 10.32 subnet, the broadcast address is 10.63, and the valid host range is 10.33 through 10.62.

Question 11.What does a switch do with a multicast frame received on an interface?
A.Forwards the switch to the first available link
B.Drops the frame
C.Floods the network with the frame looking for the device
D.Sends back a message to the originating station asking for a name resolution

Answer 11.
C. The switch will flood the network with the frame looking for the device.

Question 12.What is an access link?
A. A link that is only part of one VLAN and is referred to as the native VLAN of the port
B. A link that can carry multiple VLANs
C. A switch port connected to the Internet
D. Data and voice capability on the same interface

Answer 12.
A. Access links connect hosts to a switch and are part of only one VLAN.

Question 13.What command can you use to back up the Cisco router configuration to a TFTP host?
A. copy run tftp
B. copy flash tftp
C. copy nvram startup
D. copy tftp flash

Answer 13.
A. The command copy running-config tftp (copy run tftp for short) will copy the router’s configuration to a TFTP host for backup purposes.