Networking - subnets - multichoice questions

Question 1

How many different hosts can be connected to the subnet denoted by 10.0.1.0/24?

254
24
1024
255

Question 2

Which of the following subnets is most specifically describes the following list of hosts IP:

172.31.8.17
172.31.37.152
172.31.33.152
172.31.42.73
172.31.8.46

172.31.0.0/16
172.31.0.0/24
172.31.8.0/24
172.0.0.0/16

Use the following transcript to answer the next 4 questions.

[madonna@station madonna]$ ip address
eth0        Link encap:Ethernet HWaddr 00:00:86:4D:F0:0C
inet addr:118.45.92.51 Bcast:118.45.92.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:242939 errors:0 dropped:0 overruns:0 frame:0
TX packets:302515 errors:0 dropped:0 overruns:1 carrier:1
collisions:0 txqueuelen:100
RX bytes:24308852 (23.1 Mb) TX bytes:166603272 (158.8 Mb)
Interrupt:11 Base address:0xd400

lo          Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:29291 errors:0 dropped:0 overruns:0 frame:0
TX packets:29291 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2661822 (2.5 Mb) TX bytes:2661822 (2.5 Mb)

[madonna@station madonna]$ route -n
Kernel IP routing table
Destination     Gateway     Genmask         Flags Metric Ref Use Iface
118.45.92.0     0.0.0.0     255.255.255.0   U   0   0 0 eth0

Question 3

What is the IP address of madonna's machine?

118.45.92.0
127.0.0.1
118.45.92.51
66.23.35.53
Not enough information is provided.

Question 4

Which file is used when resolving the hostname localhost?

/etc/inittab
/etc/hosts
/etc/resolv.conf
/etc/sysconfig/localhost
None of the above

Question 5

Which of the following error messages most likely appear when madonna sends traffic to 16.74.114.3

Host is not resolvable
404 page not found
Internal server error
No route to host
None of the above

Question 6

To which network interface will the traffic be routed for the IP address 127.1.1.1?

eth0
lo
None of the above

Question 7

Suppose you have the following IP address: 192.168.1.128 Using the longest prefix match algorithm to determine the route, which of the following networks will this IP address be routed to?

192.168.1.0/32
192.168.1.0/24
192.168.1.0/16
192.168.1.0/0

Question 8

Given an IP address of 10101010 11110000 00111111 00001111, which of the below routes would be taken when using the longest prefix match algorithm?

10000000 00000000 00000000 00000000/3
11000000 00000000 00000000 00000000/3
10100000 00000000 00000000 00000000/3
10000000 00000000 00000000 00000000/3

Question 9

Given the below output of the ip address command:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
inet 192.168.0.2/24 brd 192.168.0.255 scope global eth0
valid_lft forever preferred_lft forever

3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
inet 192.168.1.2/24 brd 192.168.1.255 scope global wlan0
valid_lft forever preferred_lft forever

Assuming that a request is made to the IP address 192.168.2.0, which network interface will be used to route this request?

1
2
3
None of the above

Consider the below network, described by 156.1.0.0/16.

                    +--------------+
                    |  Subnet A    |
                    | 127 hosts    |
                    | 156.1.1.0/24 |
                    +--------------+
                           |
                           |
                           |
          +-----------------------------+
          |                             |
+-----------------+                   +----------------+
|    Subnet B     |                   |    Subnet C    |
|    58 hosts     |                   |    29 hosts    |
|   156.1.45.0/24 |                   | 156.1.5.0/24   |
+-----------------+                   +----------------+

Answer the below 4 question:

Question 10

Is the address space public or private?

Public
Private
None of the above

Question 11

Excluding the network address, and broadcast address of each subnet, how many hosts can potentially be in the whole network?

256 - 6 (network and broadcast addresses)
512 - 6 (network and broadcast addresses)
65536 - 6 (network and broadcast addresses)
214 - 6 (network and broadcast addresses)

Question 12

What is the first address of subnet A (excluding the network and broadcast addresses)?

156.1.1.0
156.1.1.1
156.1.1.255
156.1.0.0

Question 13

What is the broadcast address of subnet A?

156.1.1.0
156.1.1.1
156.1.1.255
156.1.0.0

Suppose the following route table of host Y:

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.1.1     0.0.0.0         UG    100    0        0 eth0
10.0.0.0        10.0.0.1        255.255.255.0   UG    0      0        0 eth1
192.168.1.0     0.0.0.0         255.255.255.0   U     100    0        0 eth0

Answer the below 4 questions.

Question 14

What is the default gateway address of Y?

192.168.1.0
192.168.1.1
10.0.0.1
None of the above

Question 15

What is most likely the CIDR of the subnet host Y belongs to?

192.168.1.0/16
192.168.1.0/24
10.0.0.1/24
192.168.1.0/32

Question 16

To which network interface will the traffic to 10.0.0.234 be routed?

lo
eth0
eth1
None of the above

Question 17

To which network interface will the traffic to 10.0.1.234 be routed?

lo
eth0
eth1
None of the above