ITN 100 final

Data communications and networking can be considered as a global area of study because:

a. new technologies and applications emerge from a variety of countries and spread around the world b. the technologies enable global communication

Data is physically transmitted from one computer or terminal to another in the ________ layer.

a. physical

In the three tier architecture, the software on the client computer is responsible for the ____________.

a. presentation logic

The function of the file server is to :

a. store data and software programs that can be used by client computers on the network

In __________, the network designer examines the available technologies and assesses which options will meet the users' needs.

a. technology design

Which of the following is not a purpose for using hubs in a network?

a. to act as a communications server

Hubs:

a. usually incorporate repeaters or amplifiers

The older version of IP has a ________ header of control information.

b. 192-bit

Which of the following is not a step under the traditional network design approach?

b. An analyst takes the traffic on the current network and then multiplies that by a factor of 3.65 to come up with the estimate of the total traffic for the new network.

Which of the following is not a controlled access method of media access control?

b. CSMA/CD

In the Internet model, the application layer corresponds to the ________ layer(s) of the OSI model.

b. session, presentation and application

One underlying problem with a host-based network is that:

b. the server can get overloaded since it must process all messages

The ____________ layer links the application layer with the network layer is responsible for end-to-end delivery of messages.

b. transport

The fourth layer of the OSI model is called the __________ layer.

b. transport

Which layer of the OSI model is responsible for ensuring flow control so that the destination station does not receive more packets that it can process at any given time?

b. transport

Which layer of the OSI model is responsible for ensuring that all packets sent are received by the destination station by dealing with end-to-end issues?

b. transport

A(n) _________-tiered architecture uses only two sets of computers: one set of clients and one set of servers.

b. two

____________ is not an important middleware standard.

c. Asynchronous Transfer Mode (ATM)

______________ routing is most commonly used when the application data or message can fit into one single packet.

c. Connectionless

Which of the following is true with respect to the data link layer?

c. It performs error detection.

Which is not true about point-to-point circuits?

d. point-to-point circuits reduce the amount of cable required and use the circuit more efficiently than multipoint circuits.

________ is the presentation of information to the user and the acceptance of the user's commands.

d. presentation logic

A(n) __________ circuit is another name for a multipoint configuration.

d. shared

Which of the following is not a function of the data link layer?

d. specifying the type of connection, and the electrical signals, radio waves, or light pulses that pass through it

A typical TCP packet has a _______ header of control information.

d. 192-bit

Which of the following is not contributing to the dramatic increase in network traffic today?

d. Client computers today can have 2GB of RAM, a 300 GB hard drive, and 2 Ghz processors.

_____________ routing is a method of routing in which each packet makes its own way through the network.

d. Connectionless

UDP is not commonly used for:

d. HTTP requests

The negotiation by the transport layer at the sender with the transport layer at the receiver to determine what size packets should be set up is done via establishing a(n) ___________ between the sender and receiver.

d. TCP connection

_______ is the dominant network protocol today.

d. TCP/IP

With a client-based network, one fundamental problem is that:

d. all data on the server must travel to the client for processing

A(n) __________ is the way in which the functions of the application layer software are spread among the clients and servers in the network.

d. application architecture

Which of the following is a function of the transport layer?

d. breaking long messages into several smaller messages

Which of the following is not true about a server?

d. can only perform one function on a network.

A(n) _____________ is not a common type of dedicated server.

d. collision server

Which of the following is not a property of a WAN:

d. connects a group of computers in a small geographic area such as room, floor, building or campus.

Two fundamentally different types of data are:

d. digital and analog

A(n) _________ is a LAN that uses the same technologies as the Internet but is open to only those inside the organization.

d. intranet

____________ refers to the transmission characteristics of the circuit.

d. logical circuit

A ________ is a very large general-purpose computer that is capable of performing very many functions as if these are done simultaneously, and storing extremely large amounts of data.

d. mainframe

One disadvantage of the ____________ architecture is that places a greater load on the network.

d. n-tier

The _________ layer is responsible for routing of messages from the sender to the final destination.

d. network layer

Transmission Control Protocol/Internet Protocol was developed for ________ in 1974.

a. ARPANET

Which of the following is not a key advantage of digital transmission?

a. It permits only low transmission rates.

_____________ is the software that controls the network.

a. Network Operating System

___________ is an orderly close to a dialogue between end users.

a. Session termination

A backbone network is:

a. a high speed central network that connects other networks in a distance spanning up to several miles.

Nowadays, most organizations use a simpler approach to network design called the ___________ approach.

a. building-block

In a _________ , more than one data bit is changed by the error-causing condition.

a. burst error

With QoS routing different __________ are defined, each with different priorities.

a. classes of service

With contention:

a. computers wait until the circuit is free before they send data

_________ is an application program function that deals with storing and retrieving data.

a. data storage

Which of the following type of media is most commonly used in backbone networks because of its high capacity

a. fiber

An N-tiered architecture:

a. is generally more "scalable" than a three-tiered architecture

Media access control:

a. is not very important in point-to-point with full duplex configuration

TCP uses _____________ so that the destination station can reassemble the packets into the correct order.

b. sequence numbers

Which of the following is not a basic LAN component?

b. PAD

________ is the process of sending a signal to a client that gives its permission to transmit or asks it to receive.

b. Polling

A local area network is:

b. a group of personal computers or terminals located in the same general area and connected by a common cable (communication circuit) so they can exchange informationsuch as a set of rooms, a single building, or a set of well-connected buildings.

A TCP connection is established in the ___________ routing method.

b. connection-oriented

An application program function is __________, or the processing required to access data.

b. data access logic

Having a conversation with someone using a cellular phone is an example of _________ transmission

b. full-duplex

The building block design approach is sometimes called:

b. narrow and deep

In __________, the network designer attempts to understand the fundamental current and future network needs of the various users, departments, and applications.

b. needs analysis

Networks that are designed to connect similar computers that share data and software with each other are called:

b. peer-to-peer networks

TCP/IP:

b. performs packetizing, as well as routing and addressing functions

Assume that more than one application program is using the same communications line on a particular computer. To be able to decide to which application program a message should be delivered on this computer, TCP/IP relies on the:

b. port address

The ____________ layer of the OSI model is responsible for data format translation.

b. presentation

With the two-tier client-server architecture, the client is responsible for the ________ logic.

b. presentation

The traditional network design approach does not work well for _________ networks

b. rapidly growing

In general, controlled approaches:

b. work better than contention approaches for large networks that have high usage

____________ is not a function of a data link protocol.

c. Amplitude shift keying

______________, or the algorithms or business logic programmed into the application, can be simple or complex depending on the application.

c. application logic

Client-server architectures:

c. can use middleware to provide a standard way of communicating between software from more than one vendor

_________ is the basic physical layout of the circuit.

c. circuit configuration

With the two-tier client-server architecture, the server is responsible for the ________ logic.

c. data access

A(n) _________ is a LAN that uses the same technologies as the Internet but is provided to invited users outside the organization who access it over the Internet

c. extranet

A(n) ____________ allows many users to share the same set of files on a common, shared disk drive.

c. file server

The newer form of IP, version 6 (Ipv6):

c. has an increased address size from 32 bits to 128 bits

Which of the following is not a step used in newer types of network design processes?

c. implementation

Of the following, which is not true about fiber optic cable?

c. it has a very low capacity

In a client-server network, _________ gets software from different vendors to work together.

c. middleware

Which is not a function of the physical layer:

c. providing error-free transmission of data.

__________ is not an important function of the transport layer.

c. routing

A ________ is a group of computers linked together so that they act as one computer.

c. server farm

How are the application architecture functions split up in a client-server network?

c. the presentation logic is on the client, while the data storage and data access logic are on the server

The _________ layer performs error checking which is redundant to some extent with the function of the _________ layer.

c. transport, data link

The source destination port identifier tells the destination station _____________.

c. which application layer process the packet is from.

The transport layer must break messages from the application layer into several _____ that can be sent to the data link layer.

d. packets

IP:

d. performs routing functions

__________ is not true with respect to network hubs.

e. Hubs provide a complicated way to connect network cables

Which of the following is true about roll call polling?

e. It typically involves some waiting because the server has to wait for a response from the polled client or terminal.

Which of the following is not making the traditional design approach less appropriate for today's networks?

e. The most expensive part of any network is the hardware

Which of the following is not a protocol used at the application layer

e. UDP

Which of the following is false about staff costs for a network?

e. When a variety of devices are used in a network, it takes less time to perform network management activities

In general, older networks and local loops designed to transmit voice data are likely to be ________.

e. analog

Which of the following is not a general function by any application program?

e. application access storage

In general, networks designed to transmit primarily computer data are likely to be ________.

e. digital

Which of the following is not an advantage of using Cat5 unshielded twisted pair for cabling LANs?

e. security (relative to fiber)

As part of the five-layer network model used in this textbook, the data link layer sits directly between:

e. the physical and the network layers