Question 1

A WAN __________.

Accepted Answer

A)  is managed by a single company 
B)  connects computers over vast geographic distances 
C)  is often implemented as a star network 
D)  Both b and c. 
A)  is managed by a single company 
B)  connects computers over vast geographic distances 
C)  is often implemented as a star network 
D)  Both b and c. B

Question 2

Which of the following statement about layers of the TCP/IP protocol stack is false?

Accepted Answer

A)  Each layer provides functionality for the layers above it. 
B)  Layers ease the development, debugging and maintenance of network applications. 
C)  Each layer can be implemented by following one or more protocols. 
D)  Each layer can be used independently to perform network communication. 
A)  Each layer provides functionality for the layers above it. 
B)  Layers ease the development, debugging and maintenance of network applications. 
C)  Each layer can be implemented by following one or more protocols. 
D)  Each layer can be used independently to perform network communication. D

Question 3

In a Token Ring network, a host must __________ before transmitting a message.

Accepted Answer

A)  request the token from another host currently holding the token 
B)  test the medium for any current transmissions 
C)  nothing; the host can transmit immediately 
D)  wait to receive the empty frame 
A)  request the token from another host currently holding the token 
B)  test the medium for any current transmissions 
C)  nothing; the host can transmit immediately 
D)  wait to receive the empty frame D

Question 4

The random delay in CSMA/CD Ethernet communication is __________.

Accepted Answer

A)  the amount of time it takes for a frame to be transmitted across an Ethernet link 
B)  the amount of time it takes for a transceiver to detect a collision 
C)  the amount of time a transceiver will wait after a collision before attempting to transmit the frame again 
D)  the amount of time it takes to transmit an entire Ethernet frame, including possible retransmissions 
A)  the amount of time it takes for a frame to be transmitted across an Ethernet link 
B)  the amount of time it takes for a transceiver to detect a collision 
C)  the amount of time a transceiver will wait after a collision before attempting to transmit the frame again 
D)  the amount of time it takes to transmit an entire Ethernet frame, including possible retransmissions

Question 5

HTTP typically connects at port __________.

Accepted Answer

A)  20 
B)  21 
C)  80 
D)  81 
A)  20 
B)  21 
C)  80 
D)  81

Question 6

Which of the following is not a benefit of a LAN over a WAN?

Accepted Answer

A)  LANs are independent from larger networks, allowing them to be reorganized or upgraded at the discretion of the local administrator. 
B)  LANs are autonomous, so they can be customized to meet the needs of a particular group. 
C)  LANs deal with homogenous components, making it easier to handle its connections. 
D)  LANs are not as susceptible to congestion that occurs in larger networks. 
A)  LANs are independent from larger networks, allowing them to be reorganized or upgraded at the discretion of the local administrator. 
B)  LANs are autonomous, so they can be customized to meet the needs of a particular group. 
C)  LANs deal with homogenous components, making it easier to handle its connections. 
D)  LANs are not as susceptible to congestion that occurs in larger networks.

Question 7

Which of the following is not true about TCP's windowing mechanism?

Accepted Answer

A)  The window is calculated once for the connection and not changed. 
B)  Windowing allows TCP to implement both congestion control and flow control. 
C)  A small window reduces throughput and can result in network underutilization. 
D)  A large window can cause network congestion or overflow a receiver. 
A)  The window is calculated once for the connection and not changed. 
B)  Windowing allows TCP to implement both congestion control and flow control. 
C)  A small window reduces throughput and can result in network underutilization. 
D)  A large window can cause network congestion or overflow a receiver.

Question 8

An IP address is __________.

Accepted Answer

A)  a unique destination on the Internet. 
B)  is the location of a resource on the Internet. 
C)  is a component of a computer where datagrams are directed to be sent over a network. 
D)  is another name for a hub in a star network. 
A)  a unique destination on the Internet. 
B)  is the location of a resource on the Internet. 
C)  is a component of a computer where datagrams are directed to be sent over a network. 
D)  is another name for a hub in a star network.

Question 9

A(n) __________ is not a network topology.

Accepted Answer

A)  crossbar-switch network 
B)  mesh network 
C)  bus network 
D)  ad hoc network 
A)  crossbar-switch network 
B)  mesh network 
C)  bus network 
D)  ad hoc network

Question 10

__________ is not a part of most URLs.

Accepted Answer

A)  port 
B)  layer 
C)  protocol 
D)  host 
A)  port 
B)  layer 
C)  protocol 
D)  host

Question 11

Control information can be placed __________ a message.

Accepted Answer

A)  in front of 
B)  at the back of 
C)  anywhere in 
D)  Both a and b. 
A)  in front of 
B)  at the back of 
C)  anywhere in 
D)  Both a and b.

Question 12

__________ is a routing protocol?

Accepted Answer

A)  HTTP 
B)  TCP 
C)  RIP 
D)  UDP 
A)  HTTP 
B)  TCP 
C)  RIP 
D)  UDP

Question 13

Routing __________.

Accepted Answer

A)  determines on which computer a resource resides. 
B)  is a means to add security to network communication. 
C)  converts a datagram into a format to be sent over a physical link. 
D)  is the process of determining the next host for a datagram and sending the datagram to that host. 
A)  determines on which computer a resource resides. 
B)  is a means to add security to network communication. 
C)  converts a datagram into a format to be sent over a physical link. 
D)  is the process of determining the next host for a datagram and sending the datagram to that host.

Question 14

The __________ is a tier in a three-tier system.

Accepted Answer

A)  client tier 
B)  application logic tier 
C)  data tier 
D)  All of the above. 
A)  client tier 
B)  application logic tier 
C)  data tier 
D)  All of the above.

Question 15

The purpose of a checksum is __________.

Accepted Answer

A)  to specify the number of bits in a frame 
B)  to determine if a frame was corrupted 
C)  to notify the sender that a frame was received 
D)  to encrypt the bits in a fram 
A)  to specify the number of bits in a frame 
B)  to determine if a frame was corrupted 
C)  to notify the sender that a frame was received 
D)  to encrypt the bits in a fram

Question 16

In the IEEE 802.11 specification, which of the following is a sequence of events that occurs in chronological order?

Accepted Answer

A)  RTS, transmission of message, CTS. 
B)  RTS, CTS, transmission of message. 
C)  CTS, RTS, transmission of message. 
D)  transmission of message, CTS, RTS. 
A)  RTS, transmission of message, CTS. 
B)  RTS, CTS, transmission of message. 
C)  CTS, RTS, transmission of message. 
D)  transmission of message, CTS, RTS.

Question 17

How does FDDI differ from a Token Ring?

Accepted Answer

A)  FDDI uses only one ring; a Token Ring uses two. 
B)  FDDI operates over optical fiber; Token Ring operates over copper wiring. 
C)  Token Rings circulate tokens clockwise; FDDI circulates tokens counterclockwise. 
D)  FDDI is only used in WANs; Token Rings only in LANs. 
A)  FDDI uses only one ring; a Token Ring uses two. 
B)  FDDI operates over optical fiber; Token Ring operates over copper wiring. 
C)  Token Rings circulate tokens clockwise; FDDI circulates tokens counterclockwise. 
D)  FDDI is only used in WANs; Token Rings only in LANs.

Question 18

Connection-oriented services __________.

Accepted Answer

A)  require more overhead than connectionless services 
B)  ensure reliability whereas connectionless services rely on the underlying network 
C)  send information to initiate and terminate communication whereas connectionless services send no such information 
D)  All of the above. 
A)  require more overhead than connectionless services 
B)  ensure reliability whereas connectionless services rely on the underlying network 
C)  send information to initiate and terminate communication whereas connectionless services send no such information 
D)  All of the above.

Question 19

The four layers of the TCP/IP protocol stack, in order from highest to lowest, are __________, __________, __________ and __________.

Accepted Answer

A)  application, transport, network, link 
B)  application, network, transport, link 
C)  network, link, application, transport 
D)  link, transport, application, network 
A)  application, transport, network, link 
B)  application, network, transport, link 
C)  network, link, application, transport 
D)  link, transport, application, network

Question 20

If a datagram was lost in a streaming video application using UDP, __________.

Accepted Answer

A)  the application would fail 
B)  the user would experience a short pause in the video playback 
C)  the application would wait for the lost datagram to be retransmitted 
D)  nothing would happen 
A)  the application would fail 
B)  the user would experience a short pause in the video playback 
C)  the application would wait for the lost datagram to be retransmitted 
D)  nothing would happen

Exam 16: Understanding the Layers of the TCP/IP Protocol Stack

A WAN __________.

Which of the following statement about layers of the TCP/IP protocol stack is false?

In a Token Ring network, a host must __________ before transmitting a message.

The random delay in CSMA/CD Ethernet communication is __________.

HTTP typically connects at port __________.

Which of the following is not a benefit of a LAN over a WAN?

Which of the following is not true about TCP's windowing mechanism?

An IP address is __________.

A(n) __________ is not a network topology.

__________ is not a part of most URLs.

Control information can be placed __________ a message.

__________ is a routing protocol?

Routing __________.

The __________ is a tier in a three-tier system.

The purpose of a checksum is __________.

In the IEEE 802.11 specification, which of the following is a sequence of events that occurs in chronological order?

How does FDDI differ from a Token Ring?

Connection-oriented services __________.

The four layers of the TCP/IP protocol stack, in order from highest to lowest, are __________, __________, __________ and __________.

If a datagram was lost in a streaming video application using UDP, __________.

Exploring Operating Systems and Distributed Computing: a Comprehensive Overview

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Understanding Processes and Threads in Operating Systems

Exploring Semaphores and Multithreading in Operating Systems

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Concurrency and Deadlock in Database Systems: Exploring Monitor Implementation and Thread Synchronization in Java

Operating System Scheduling and Deadlock Prevention: a Comprehensive Guide

Understanding Processor Scheduling and Memory Management in Operating Systems

Memory Management in Operating Systems: Segmentation, Paging, and Strategies for Efficiency

Memory Management and Address Translation in Operating Systems

Memory Management and Page Replacement Strategies in Operating Systems

Disk Storage and Raid Technology

Understanding File Systems and Database Systems: a Comprehensive Overview

Exploring Performance Evaluation and Benchmarking in Computer Systems

Understanding Multiprocessor Organizations and System Performance

Understanding Distributed Systems and Operating Systems

Exploring Distributed File Systems and Grid Computing With NFS, AFS, Coda, and JXTA

Security Threats and Solutions in Cryptography and Access Control

Exploring the Linux Operating Systems Features and Functionality

In-Depth Analysis of Windows XP

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