Networking Questions 1

Questions by Rejinpaul.com

1. How long is an IPv6 address?

a)32 bits
b)128 bytes
c)64 bits
d)128 bits

The Correct Answer is: d)128 bits
Explanation: An IPv6 address is 128 bits long.

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

a)NAT
b)Static
c)Dynamic
d)PAT

The Correct Answer is: d)PAT
Explanation: Port Address Translation (PAT) allows a one-to-many approach to network address
translation.

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

a)copy running backup
b)copy running-config startup-config
c)config mem
d)wr mem

The Correct Answer is: b)copy running-config startup-config
Explanation: The command to back up the configuration on a router is copy running-config
startup-config.

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4. Which WLAN IEEE specification allows up to 54Mbps at 2.4GHz?

a)A
b)B
c)G
d)N

The Correct Answer is: c)G
Explanation: IEEE 802.11B is 2.4GHz, but with a maximum of only 11Mbps. IEEE 802.11G is in the
2.4GHz range, with a top speed of 54Mbps.

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5. Which of the following is the valid host range for the subnet on which the IP address
192.168.168.188 255.255.255.192 resides?

a)192.168.168.129-190
b) 192.168.168.129-191
c)192.168.168.128-190
d)192.168.168.128-192

The Correct Answer is: a)192.168.168.129-190
Explanation: 256 - 192 = 64. 64 + 64 = 128. 128 + 64 = 192. The subnet is 128, the broadcast
address is 191, and the valid host range is the numbers in between, or 129-190.

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6. To back up an IOS, what command will you use?

a)backup IOS disk
b)copy ios tftp
c)copy tftp flash
d)copy flash tftp

The Correct Answer is: d)copy flash tftp
Explanation: The command copy flash tftp will prompt you to back up an existing IOS in flash
to a TFTP host.

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7. What protocol does PPP use to identify the Network layer protocol?

a)NCP
b)ISDN
c) HDLC
d)LCP

The Correct Answer is: a)NCP
Explanation: Network Control Protocol is used to help identify the Network layer protocol used in the packet. the packet.

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8. Which protocol does DHCP use at the Transport layer?

a)IP
b)TCP
c)UDP
d)ARP

The Correct Answer is: c)UDP
Explanation: User Datagram Protocol is a connection network service at the Transport layer, and
DHCP uses this connectionless service.

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9. Which command is used to determine if an IP access list is enabled on a particular interface?

a)show access-lists
b)show interface
c)show ip interface
d)show interface access-lists

The Correct Answer is: c)show ip interface
Explanation: The show ip interface command will show you if any outbound or inbound
interfaces have an access list set.

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10. Where is a hub specified in the OSI model?

a)Session layer
b)Physical layer
c)Data Link layer
d)Application layer

The Correct Answer is: b)Physical layer
Explanation: Hubs regenerate electrical signals, which are specified at the Physical layer.

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11. Which protocol is used to send a destination network unknown message back to
originating hosts?

a)TCP
b)ARP
c) ICMP
d)BootP

The Correct Answer is: c) ICMP
Explanation: ICMP is the protocol at the Network layer that is used to send messages back to an
originating router.

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12. How often are BPDUs sent from a layer 2 device?

a)Never
b)Every 2 seconds
c)Every 10 minutes
d) Every 30 seconds

The Correct Answer is: b)Every 2 seconds
Explanation: Every 2 seconds, BPDUs are sent out from all active bridge ports by default.

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13. How many broadcast domains are created when you segment a network with a
12-port switch?

a)1
b)2
c)5
d)12

The Correct Answer is: a)1
Explanation: By default, switches break up collision domains but are one large broadcast domain.

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14. What PPP protocol provides dynamic addressing, authentication, and multilink?

a)NCP
b)HDLC
c)LCP
d)X.25

The Correct Answer is: c)LCP
Explanation: Link Control Protocol in the PPP stack provides dynamic addressing, authentication,
and multilink.

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15. How many collision domains are created when you segment a network with a 12-port switch?

a)1
b)2
c)5
d)12

The Correct Answer is: d)12
Explanation: Layer 2 switching creates individual collision domains.

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16. What command will display the line, protocol, DLCI, and LMI information of an interface?

a)sh pvc
b)show interface
c)show frame-relay pvc
d)show run

The Correct Answer is: b)show interface
Explanation: The show interface command shows the line, protocol, DLCI, and LMI information
of an interface.

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17. Which protocol does Ping use?

a)TCP
b)ARP
c)ICMP
d)BootP

The Correct Answer is: c)ICMP
Explanation: ICMP is the protocol at the Network layer that is used to send echo requests and
replies.

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18. Which command is used to upgrade an IOS on a Cisco router?

a)copy tftp run
b)copy tftp start
c)config net
d)copy tftp flash

The Correct Answer is: d)copy tftp flash
Explanation: The copy tftp flash command places a new file in flash memory, which is the
default location for the Cisco IOS in Cisco routers.

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19. If you wanted to delete the configuration stored in NVRAM, what would you type?

a)erase startup
b) erase nvram
c)delete nvram
d)erase running

The Correct Answer is: a)erase startup
Explanation: The command erase startup-config deletes the configuration stored in NVRAM.

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20.You have 10 users plugged into a hub running 10Mbps half-duplex. There is a server
connected to the switch running 10Mbps half-duplex as well. How much bandwidth
does each host have to the server?

a)100 kbps
b) 1 Mbps
c)2 Mbps
d)10 Mbps

The Correct Answer is: d)10 Mbps
Explanation: Each device has 10 Mbps to the server.

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