Deck 9: Network Organization Concepts

Question 1

Star topology permits easy routing.

Answer 1

True

Question 2

In the virtual circuit approach, the destination and packet sequence number are not added to the information identifying the packet's message.

Answer 2

True

Question 3

A MAN is a high-speed network often configured using a physical ring topology.

Answer 3

False

Question 4

A common goal of all networked systems is to provide a convenient way to share resources while controlling users' access to them.

Question 5

When using RIP the entire table is updated only when changes have occurred; this decreases internetwork traffic and positively affects the delivery of messages.

Question 6

Typically, a host at one site, called the client, has resources that a host at another site, called the server, wants to use.

Question 7

A WLAN typically poses security vulnerabilities because of its open architecture and the inherent difficulty of keeping out unauthorized intruders.

Question 8

Packet switching is very similar to circuit switching.

Question 9

The objective of a hybrid configuration is to select among the strong points of each topology and combine them to meet that system's communications requirements most effectively.

Question 10

In a ring topology each packet is passed from node to node in both directions, and the destination station copies the data into a local buffer.

Question 11

A router is an internetworking device, primarily software driven, which directs traffic between two different types of LANs or two network segments with different protocol addresses.

Question 12

The IEEE standard 802.11b is not compatible with 802.11g.

Question 13

The tree topology is a collection of rings.

Question 14

In a bus topology, devices are physically connected by means of cables that run between them, and the cables pass through a centralized controller mechanism called the bus.

Question 15

Ethernet is the most widely known CSMA/CD protocol.

Question 16

Round robin is an inefficient technique when there are many nodes transmitting over long periods of time.

Question 17

Circuit switching is a communication model in which a dedicated communication path is established between two hosts.

Question 18

The physical topology of a network may not reflect its logical topology.

Question 19

Addressing protocols are normally unrelated to the network topology and geographic location of each site.

Question 20

A local area network is generally owned, used, and operated by a single organization and allows computers to communicate directly through a common communication line.

Question 21

Layer 6 of the OSI model is responsible for providing a user-oriented connection service and transferring data over the communication lines.

Question 22

Bridging between two homogeneous networks occurs at the data link level.

Question 23

A token-passing network always uses a star topology.

Question 24

When using a ring topology, a ____ can be used to connect to another network.

A) star
B) central controller
C) router
D) bridge

Question 25

When using RIP, the path ____ is chosen.

A) with the fastest server
B) that is most secure
C) with the shortest response time
D) with the smallest number of hops

Question 26

In the address [e-mail], the host name in this address is ____.

A) someone
B) icarus
C) lis
D) pitt

Question 27

A ____ is the specific set of rules used to control the flow of messages through the network.

A) topology
B) protocol
C) system
D) configuration

Question 28

Usually, the term "____" indicates a specific location in a network containing one or more computer systems.

A) site
B) host
C) node
D) remote

Question 29

The Internet layer is equivalent to the data link layer of the OSI model.

Question 30

When deciding which configuration to use, designers should keep in mind four criteria: ____.

A) equipment cost, time to implement, reliability, and scalability
B) equipment cost, time to implement, throughput, and security
C) basic cost, communication cost, reliability, and user's environment
D) basic cost, scalability, reliability, and user's environment

Question 31

The geometric arrangement of connections (cables, wireless, or both) that link the nodes is called a ____.

A) layout
B) topology
C) map
D) physical network

Question 32

The maximum circumference for a MAN is ____.

A) 10 miles
B) 50 kilometers
C) 100 kilometers
D) 200 miles

Question 33

A ____ is an internetworking device, primarily software driven, which directs traffic between two different types of LANs or two network segments with different protocol addresses.

A) router
B) bridge
C) gateway
D) bus

Question 34

When using the distributed-queue, dual bus (DQDB) protocol, transmission on each bus consists of a steady stream of fixed-size slots.

Question 35

The ____ is the most vulnerable to security breaches.

A) LAN
B) MAN
C) WAN
D) WLAN

Question 36

In the ____ topology, hosts are connected to one another in a linear fashion.

A) bus
B) ring
C) star
D) gateway

Question 37

High-speed LANs have a data rate that varies from 100 megabits per second to more than ____ per second.

A) 1000 megabits
B) 20 gigabits
C) 40 gigabits
D) 100 gigabits

Question 38

A ____ is typically a cluster of personal computers or workstations located in the same general area.

A) LAN
B) MAN
C) WAN
D) PAN

Question 39

When using a bus topology, ____ sites can successfully send a message at a time.

A) 1
B) 10
C) 100
D) an unlimited number

Question 40

In the ____ topology configuration hosts are connected to each other through a central controller which assumes all responsibility for routing messages to the appropriate host.

A) bus
B) spiral
C) ring
D) star

Question 41

In the OSI transport protocol model, Layer Six is ____.

A) physical
B) network
C) presentation
D) application

Question 42

The distributed-queue, dual bus (DQDB) protocol is intended for use with a dual-bus configuration, where each bus transports data in only one direction, and has been standardized by one of the IEEE committees as part of its ____ standards.

A) token ring
B) MAN
C) LAN
D) ISO

Question 43

____ is a good example of a circuit-switched network.

A) A telephone system
B) The Internet
C) The United States Postal Service
D) A local area network

Question 44

In the TCP/IP model, the ____ layer is equivalent to the transport and session layers of the OSI model.

A) host-host
B) Internet
C) network access
D) process/application

Question 45

There are ____ layers in the TCP/IP model.

A) two
B) four
C) seven
D) ten

Question 46

Carrier sense multiple access (CSMA) is a ____-based protocol.

A) round robin
B) reservation
C) contention
D) detection

Question 47

____ is true of packet switching.

A) Preferred in low volume networks
B) Easily overloaded
C) Reduced line efficiency
D) Shared by many transmissions

Question 48

In the OSI model, Layer ____ provides the interface to users and is responsible for formatting user data before passing it to the lower layers for transmission to a remote host.

A) Three
B) Four
C) Six
D) Seven

Question 49

In the ____ approach, the destination and sequence number of the packet is added to the information uniquely identifying the message to which the packet belongs; each packet is then handled independently and a route is selected as each packet is accepted into the network.

A) physical circuit
B) datagram
C) telegram
D) virtual circuit

Question 50

When using CSMA/CD, and a collision occurs, a jamming signal is sent immediately to both sending nodes, which then wait ____ before trying again.

A) one millisecond
B) one second
C) one minute
D) a random period