Question

1.

a. Which of the following services could not be provided to a flow of packets between a given source and destination?

	A.	In-order packet delivery
	B.	Guaranteed maximum bandwidth
	C.	Guaranteed maximum jitter
	D.	Security services

b. In the following protocols, which group is used extensively for routing within an autonomous system in the Internet?

	A.	The Routing Information Protocol (RIP) and IS-IS protocol
	B.	The IS-IS protocol and Open Shortest Path First (OSPF)
	C.	The Routing Information Protocol (RIP) and Open Shortest Path First (OSPF)
	D.	The Border Gateway Protocol (BGP) and Open Shortest Path First (OSPF)

c. A network administrator can configure DHCP so that a given host receives the same IP address each time it connects to the network, or a host may be assigned a temporary IP address that will be different each time the host connects to the network.

True

False

d. What is a function of routing processor?

	A.	It stores packets received from the switching fabric and transmits these packets on the outgoing link
	B.	It connects the router's input ports to its output ports
	C.	It executes the routing protocols, maintains routing tables and attached link state information and computes the forwarding table for the router
	D.	It performs the physical layer function of terminating an incoming physical link at a router

e. The computational complexity of the Link-State (LS) Routing Algorithm is ____.

	A.	O[(n-1)2]
	B.	O[(n+1)2]
	C.	O(n2)
	D.	O(n)

f. In multicast routing, the network layer provides a service of delivering a packet sent from a source node to all other nodes in the network; broadcast routing enables a single source node to send a copy of a packet to a subset of the other network nodes.

True

False

g. Which of the following is an important ATM service model?

	A.	Constant bit rate (CBR) ATM network service
	B.	Available bit rate (ABR) ATM network service
	C.	Both A and B
	D.	Neither A nor B

Answer 1

a. Which of the following services could not be provided to a flow of packets between a given source and destination?

A.In-order packet delivery
B.Guaranteed maximum bandwidth
C.Guaranteed maximum jitter
D.Security services
Ans:- B. Guaranteed maximum bandwidth
Limits the bandwidth used in a policy rule.

b. In the following protocols, which group is used extensively for routing within an autonomous system in the Internet?

A.The Routing Information Protocol (RIP) and IS-IS protocol
B.The IS-IS protocol and Open Shortest Path First (OSPF)
C.The Routing Information Protocol (RIP) and Open Shortest Path First (OSPF)
D.The Border Gateway Protocol (BGP) and Open Shortest Path First (OSPF)
Ans:- C. The Routing Information Protocol (RIP) and Open Shortest Path First (OSPF)
RIP:-
1)RIP is distance vector routing protocol.
2)It is used for data/packet transmission.
3)In this protocol the maximum number of Hop is 15, because it prevents routing loops from source to destination.
4)Routing Information Protocol is poor and limit size .
5)The advantage of this protocol is it uses the User Datagram Protocol.
OSPF:-
1)OSPF protocol uses link-state routing algorithm.
2)By using this information which is available in routers, it constructs the topology in which the topology determines the routing table for routing decisions.
3)The advantage of the OSPF is that it handles the error detection by itself and it uses multicast addressing for routing in a broadcast domain.

c. A network administrator can configure DHCP so that a given host receives the same IP address each time it connects to the network, or a host may be assigned a temporary IP address that will be different each time the host connects to the network.

True
False
Ans:- True
IP address to a host which lasts for a particular duration which goes for a few hours,few days or few weeks.

d. What is a function of routing processor ?

A.It stores packets received from the switching fabric and transmits these packets on the outgoing link
B.It connects the router's input ports to its output ports
C.It executes the routing protocols, maintains routing tables and attached link state information and computes the forwarding table for the router
D.It performs the physical layer function of terminating an incoming physical link at a router
Ans:- C.It executes the routing protocols, maintains routing tables and attached link state information and computes the forwarding table for the router
1)Routing processor distributes forwarding tables.
2) It perfoms network management functions within the router.

e. The computational complexity of the Link-State (LS) Routing Algorithm is ____.

A.O[(n-1)²]
B.O[(n+1)²]
C.O(n²)
D.O(n)
Ans:- D. O(n)

f. In multicast routing, the network layer provides a service of delivering a packet sent from a source node to all other nodes in the network; broadcast routing enables a single source node to send a copy of a packet to a subset of the other network nodes.

True
False
Ans:- True
Multicast routing is a networking method for efficient distribution of one-to-many traffic.

g. Which of the following is an important ATM service model?

A.Constant bit rate (CBR) ATM network service
B.Available bit rate (ABR) ATM network service
C.Both A and B
D.Neither A nor B
Ans:- C. Both A and B
1)The CBR service class is designed for ATM virtual circuits needing a static amount of bandwidth that is continuously available for the duration of the active connection.
2)ABR is used in ATM networks when source and destination do not need to be synchronized.