Questions on Routing Fundamentals

1) What is the All – Subnet-directed broadcast address for the network 172.16.0.0/24?

A) 172.16.0.255
B) 172.16.255.0
C) 172.16.255.255
D) 255.255.255.255

2) Which of the following parameters is not used for routing an inbound IP packet?

A) Destination IP address in the IP packet
B) Route entry in the router
C) Default route entry in the router
D) Subnet mask of the sender of the packet

3) What is the bitwise result if the IP address 255.255.255.255 is “AND” ed with network mask 255.255.255.255?

A) 255.255.255.255
B) 0.0.0.0
C) Cannot perform the operation
D) 255.0.255.0

4) An IP packet arrives on a router. Which of the following parameters in the routing table of the router would be used to perform the “ANDing” operation with the destination IP address in the IP packet to determine the destination network interface?

A) Network mask of the route entries
B) Network address of the route entries
C) Metric of every route entries
D) Default gateway address

5) What would be the output value when a destination IP address(192.168.1.1) in an IP packet is “ANDed” with a default route entry on a router?

A) 192.168.1.0
B) 0.0.0.0
C) 255.255.255.255
D) None of these

6) If the IP address 192.168.1.0/31 was valid and usable, what would be the broadcast address for the network?

A) 192.168.1.255
B) 192.168.1.1
C) 192.168.0.0
D) 255.255.255.255

7) A router which supports classful addressing receives an IP packet with destination IP address as 192.168.2.5. How many bits in the first octet of the destination IP address would be checked by the router to determine the class?

A) Based on the class of the destination IP address in the IP packet.
B) 3
C) 1
D) 2

8 ) What would be the value in the protocol field in an IP header which has DNS as the application data?

A) 53
B) 17
C) 50
D) 52

9) What is the subnet number of the following IP address?

IP address : 192.168.1.129

Subnet mask: 255.255.255.192

A) 0.0.0.128
B) 192.168.1.128
C) 0.0.0.0
D) 192.168.1.0

 10) What is the host number of the following IP address?

IP address: 10.0.0.65

Subnet mask: 255.255.255.0

A) 10.0.0.65
B) 0.0.0.65
C) 10.0.0.64
D) 10.1.1.1

11) What is the subnet mask in a routing table of a router used for?

A) To identify the number of interesting bits which should be looked up in the destination IP address in an IP packet
B) To identify the number of interesting bits which should be looked up in the destination network address in the routing table.
C) To identify the number of non – interesting bits which should not be looked up in the destination network address in the routing table.
D) To identify the number of non – interesting bits which should not be looked up in the destination IP address in an IP packet.

12) An organization has one branch and main office respectively. The main office is connected to the internet via its perimeter router configured with a Public IP address (A.B.C.D). The branch office is also connected to the internet via its perimeter router configured with a Public address (E.F.G.H). The organization website is hosted on a web server in the main office. If a user in the branch office wants to access the website, what configuration would need to be provided on the branch office perimeter router?

A) Static route with the following configuration

ip route “network address” “subnet mask” “gateway IP address”

Network address = Network address of A.B.C.D
Subnet mask = Network mask of A.B.C.D
Gateway: A.B.C.D
B) Static route with the following configuration

IP route “network address” “subnet mask” “gateway IP address”

Network address = Network address of A.B.C.D
Subnet mask = Network mask of A.B.C.D
Gateway: Gateway IP address of branch office perimeter router.
C) N/W Mask Gateway
ip route 0.0.0.0 0.0.0.0 Gateway IP of branch office
D) N/W Mask Gateway
ip route 0.0.0.0 0.0.0.0 Public IP of Main office

13) What is the value of the high order bit in a Class A first Octet?

A) 0
B) 10
C) 1
D) 126

14) Two PC’s are configured on two networks on E0 and E1 interface on a router. E0 is on the network 192.168.1.0/24 and E1 is on the network 192.168.2.0/24. How many IP addresses are required totally if (Configured On the PC’s and the router) the PCs are to communicate end to end?

A) 2
B) 3
C) 4
D) 5

15) A broadcast domain has 3 different networks. If a PC wants to participate in all the networks, what feature on the PC would help to perform the same?

A) Subnetting
B) Multinetting
C) Multiplexing
D) Routing

16) PC1 is configured on class B subnetted network. PC2 is configured on a different class B subnetted network. PC1 and PC2 are on the same ethernet segment and share the same broadcast domain. If16) PC1 wants to communicate with PC2 which of the following is required?

A) A router
B) Same subnet mask on both the PC’s
C) Same network mask on both the PC’s
D) None of the above

17) A major network 192.168.1.0/24 is subnetted with the subnet mask of 255.255.255.224. If Subnet-Zero is allowed, which of the following network addresses would be invalid?

A) 192.168.1.0/27
B) 192.168.1.32/27
C) 192.168.1.64/27
D) None of the above

18) Two hosts are connected to a switch. The IP address of the first host is 192.168.1.33/24 and the second host is 192.168.1.34/27. What would happen if host 1 pings host 2? Assume there is no default gateway configured on the hosts.

A) Ping will be successful.
B) Ping response will be dropped at host 1
C) Ping response will be dropped at host 2
D) Network unreachable message will be triggered

19) A user on the PC pings the website www.networkinterfaze.com. The IP address of the PC is 192.168.1.2/24 and the default gateway is 192.168.1.1/24. The DNS Server IP address configured on the PC is 192.168.1.3/24. What would be the destination IP address in the first packet generated after the ping command is executed on the PC?

(Assume that the DNS cache in the local PC has been cleared prior to the ping request)

A) 192.168.1.1
B) 192.168.1.3
C) IP address of www.networkinterfaze.com
D) None of the above

20) The IP address of a PC is 192.168.1.2/24 and it’s default gateway is 192.168.1.1/24. The user on the PC pings an IP address which is on a different network ( IP address: 192.168.2.2, Default gateway: 192.168.2.1). What would be the destination IP address in the ping response packet coming from the IP address 192.168.2.2?

A) 192.168.2.1
B) 192.168.1.1
C) 192.168.1.2
D) The default gateways management IP address