Fill This Form To Receive Instant Help
Fill This Form To Receive Instant Help
Homework answers / question archive / Saudi Electronic University IT 210 CHAPTER 18 1)Packetizing at the network layer involves___________
Saudi Electronic University
IT 210
CHAPTER 18
1)Packetizing at the network layer involves___________.
A) encapsulating the payload at the source
B) adds a header that contains the source and destination information C) decapsulating the payload at the destination
D) All of the choices are correct
2 Routers in the path are not allowed to . A) fragment the packet they receive
B) decapsulate the packet
C) change source or destination address D) All of the choices are correct
3 The network layer in the Internet provides . A) comprehensive error and flow control
B) limited error control, but no flow control
C) comprehensive error control but limited flow control D) All of the choices are correct
4 In a virtual-circuit approach, the forwarding decision is based on the value of the
field in the packet header. A) source address
B) destination address C) label
D) None of the choices are correct
5 In a datagram approach, the forwarding decision is based on the value of the
field in the packet header. A) source address
B) destination address C) label
D) None of the choices are correct
6 The performance of a network can be measured in terms of . A) delay
B) throughput C) packet loss
D) All of the choices are correct
7 Transmission delay (time) is the ratio of . A) transmission rate to packet length
B) transmission rate to distance
C) packet length to transmission rate D) processing time to transmission rate
8 Propagation delay (time) is the ratio of . A) transmission rate to propagation speed
B) propagation speed to distance
C) packet length to propagation speed D) distance to propagation speed
9 When the load in the network reaches the network capacity, the packet delay
and the network throughput reaches .
A) increases sharply; its minimum B) increases sharply; its maximum C) decreases sharply; its minimum D) decreases sharply; its maximum
10 In open-loop congestion control, policies are applied . A) to prevent congestion before it happens
B) to alleviate congestion after it happens
C) to either prevent congestion before it happens or alleviate congestion after it happens D) None of the choices are correct
11 The technique is one of the open-loop congestion policies. A) backpressure
B) choke packet
C) implicit signaling
D) None of the choices are correct
12 The technique is one of the close-loop congestion policies. A) acknowledgment policy
B) choke packet
C) discarding policy
D) None of the choices are correct
13 An IPv4 address is normally represented in base in dotted-decimal notation. A) 16
B) 256
C) 10
D) None of the choices are correct
14 In classful addressing, the IPv4 address space is divided into classes. A) 3
B) 4 C) 5
D) None of the choices are correct
15 The number of addresses assigned to an organization in classless addressing . A) can be any number
B) must be a multiple of 256 C) must be a power of 2
D) None of the choices are correct
16 The first address assigned to an organization in classless addressing . A) must be evenly divisible by the number of addresses in the organization
B) must be divisible by 128
C) must belong to one of the A, B, or C classes D) None of the choices are correct
17 In subnetting, the number of addresses in each subnet must . A) be a power of 2
B) be a multiple of 128 C) be divisible by 128
D) None of the choices are correct
18 What is the default prefix length for class A in CIDR notation? A) 9
B) 8 C) 16
D) None of the choices are correct
19 What is the default prefix length for class B in CIDR notation? A) 9
B) 8 C) 16
D) None of the choices are correct
20 What is the default prefix length for class C in CIDR notation? A) 24
B) 8 C) 16
D) None of the choices are correct
21 DHCP is a (an) layer protocol. A) application
B) transport C) network D) data-link
22 In DHCP, the client uses port and the server uses port. A) an ephemeral; a well-known
B) a well-known; a well-known C) a well-known; an ephemeral
D) None of the choices are correct
23 DHCP uses the services of . A) UDP
B) TCP
C) IP
D) None of the choices are correct
24 allows a site to use a set of private addresses for internal communication and a set of global Internet addresses for
communication with the rest of the world. A) DHCP
B) NAT C) IMCP
D) None of the choices are correct
25 The idea of address aggregation was designed to alleviate the increase in routing table entries when using
addressing. A) classful B) classless
C) classful or classless
D) None of the choices are correct
26 The use of hierarchy in routing tables can the size of the routing tables. A) reduce
B) increase
C) neither reduce nor increase
D) None of the choices are correct
