Networking past exam paper

How can the IPv6 address 12a3:0000:0000:0000:0035:0000:0000:000c be represented correctly using the fewest characters a. 12a3::35:000c b. 12a3::35::c c. 12a3::35:0:0:c d. 12a3:0:0:0:35:0:0:c

c

How would you "pipe" the output of one command or utility directly into another? a. command1 > command2 b. command1 < command2 c. command1 | command2 d. command1 - command2

c

Identify the correct difference between IPv4 and IPv6 a. IPv4 has 32 bits while IPv6 has 32 bytes b. IPv4 has 4 bytes while IPv6 has 6 bytes c. IPv4 has 32 bits while IPv6 has 128 bits d. IPv4 is a long-term solution while IPv6 is a short-term solution to IP address depletion

c

The effect of subnetting on a network is a. Slows down the network b. Increase subnet size to accommodate more PCs c. Increase network performance by creating smaller broadcast domains d. The network becomes more difficult to manage

c

The number of valid host address that can be addressed by 18.0.0.0/8 is a. 255x255x255 b. 256x256x256 c. 256x256x256-2 d. 254x254x254

c

The reason that computer A can't communicate with computer B is a) Computer B has no default gateway. b) Computer A and Computer B have different host ID c) Computer A has a different Net ID to Computer B d) Computer A is on a different physical Network to Computer B

c

To remove an empty folder under linux you would issue the command a. mkdir b. mdir c. rmdir d. cd

c

What does the term "attenuation" mean in data communication? a. Time for a signal to reach its destination b. Leakage of signals from one cable pair to another c. Loss of signal strength as distance increases d. Strengthening of a signal by a networking device

c

What type of address is 198.16.1.0/24? a. Private IP address b. Multicast address c. Network address d. Broadcast address

c

Which of the following host IP address is invalid [assume default subnet mask]? a. 1.1.1.127 b. 100.0.255.255 c. 127.0.0.1 d. 17.0.0.1

c

Convert the binary number 11101101 to hex a. EA b. ED c. CB d. FC

b

Convert the decimal number 243 to binary a. 11110110 b. 11110011 c. 11100101 d. 11110100

b

Cyclic Redundancy Check (CRC) is a. An error correction method b. An error detection method c. A flow control method d. The name of the first layer of the TCP/IP model

b

How does fibre-optic cable differ from copper cable? a. Copper is more expensive than fibre-optic b. Fibre uses light while copper uses electrical signal c. Copper has greater bandwidth fibre d. Copper has more immunity to electromagnetic interference than fibre

b

If the default gateway is configured incorrectly on the host, what is the impact on communications? a. The host is unable to communicate on the local network. b. The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks c. The host can communicate with other hosts on remote networks, but is unable to communicate with hosts on the local network d. There is no impact on communications

b

Which networking device do you use to connect network hosts together? a. a router b. a layer 2 switch c. a repeater d. a file server

b

Which one of the following IP address and subnet mask combination is correct? [Assuming default subnet mask] a. 10.1.2.3 255.255.0.0 b. 160.45.23.5 255.255.0.0 c. 191.23.4.23 255.0.0.0 d. 192.168.1.3 255.255.0.0

b

Which one of the following statements is true about 'time dependant applications'? a. They require lost packets to be retransmitted. b. They require continuous throughput c. Email is an example of a time dependant application d. They are applications that consume too much time

b

Convert the binary number 11110111 to decimal a. 236 b. 226 c. 252 d. 247

d

Convert the hex number A5E8 to binary a. 1110 0101 1110 1000 b. 1010 0101 1110 1001 c. 1010 1101 1110 1100 d. 1010 0101 1110 1000

d

How do you know if 2 PCs are on different networks? a. They have different host ID b. They have the same subnet mask c. The have different MAC address d. They have different NetID

d

The first valid and last valid host IP address on 200.18.10.0/24 is a. 200.18.10.0 and 200.18.10.254 b. 200.18.10.1 and 200.18.10.255 c. 200.18.10.1 and 200.18.10.256 d. 200.18.10.1 and 200.18.10.254

d

The subnet mask 255.255.255.248 is represented by the notation: a. /248 b. /28 c. /48 d. /29

d

What are the TCP/IP addressing requirements for 2 hosts to communicate on different local area network? a. You only need the IP address and MAC address. b. IP address and subnet mask c. IP address, Subnet mask and MAC address d. IP address, subnet mask, and default gateway

d

The command 'sudo' Under Linux, is used to: a. Issue a following command which requires privilege elevation b. Take you to home directory c. Configure network interface card d. Add a user to the system

a

The notation /25 means: a. 255.255.255.128 b. 255.255.255.125 c. 255.255.255.25 d. 255.255.255.225

a

Under Linux, the command-line utility which can list details of your machines network interface cards is a. ifconfig b. ipconfig c. netconfig d. ip-config

a

Which of the following subnet masks is correct? a. 255.255.255.224 b. 255.255.255.250 c. 255.255.255.260 d. 255.255.0.255

a