Archive for November 2017

Which of the following is not an effective way to reduce LAN network demand:

Which of the following is not an effective way to reduce LAN network demand: 




a. move files to client computers
b. use disk caching on the client machines
c. find an application that places a large demand on the network and run it a time when the network is lightly loaded
d. add hidden nodes
e. shift the users' routines



Answer: D

Which of the following is not true about switched Ethernet?

Which of the following is not true about switched Ethernet? 



a. The switch has a physical bus topology.
b. It uses a switch instead of a hub.
c. It has faster connections (almost immediate) than traditional Ethernet.
d. It essentially provides a point-to-point connection between computers.
e. It has forwarding tables in which entries are learned over time.


Answer: A

Switched Ethernet:

Switched Ethernet:



a. always has a lower capacity than shared Ethernet.
b. operates at 50% of capacity before performance becomes a problem.
c. operates at about 95% of capacity before performance becomes a problem.
d. is affected by the increased collisions caused by using a switched LAN design.
e. decreases network performance because each computer is connected via a common multipoint circuit.



Answer: C

Which of the following is not true about layer-2 switched Ethernet?

Which of the following is not true about layer-2 switched Ethernet?



a. A switch replaces the hub.
b. The physical topology is the same as the physical topology of shared Ethernet: a ring.
c. The logical topology is a star.
d. The switch uses a forwarding table to route the packet to the correct circuit/computer.
e. The switch chooses which packet to transmit first if it receives more than one packet destined for the same computer at the same time, and stores the other packet(s) temporarily.



Answer: B

Which of the following is not true about CSMA/CD?

Which of the following is not true about CSMA/CD? 



a. The acronym refers to Carrier Sense Multiple Access with Collision Detection
b. It is used in token ring protocol LANs
c. It is a contention-based media access control technique
d. When a collision has occurred, the computers that wish to transmit wait a random amount of time after a colliding message before attempting to retransmit
e. Computers on the circuit 'listen' before transmitting



Answer: B

A logical bus topology:

A logical bus topology: 



a. is always used by token ring protocol LANs
b. has all computers connected to each other in point-to-point connections
c. is limited to short distances since devices like a hub or repeater cannot be used with this type of topology
d. permits every message to be received by every computer on the bus, even when those messages are intended for other computers
e. has a central control device, such as a mainframe



Answer: D

________ is how the network works conceptually.

________ is how the network works conceptually.




a. Physical topology
b. Logical topology
c. Network topology
d. Ethernet
e. Media access control



Answer: B

Ethernet LAN was developed by:

Ethernet LAN was developed by: 



a. IBM
b. ARPANET
c. DEC, Xerox, and Intel
d. University of Minnesota
e. CERN laboratory in Geneva



Answer: C

The server version of the Network Operating System does not:

The server version of the Network Operating System does not: 




a. provide the software that performs the functions associated with the physical layer
b. provide the software that performs the functions associated with the data link layer
c. provide the software that performs the functions associated with the application layer
d. provide the software that performs the functions associated with the network layer
e. usually provide the software that performs the functions associated with the computer's own operating system



Answer: A

_______ is the software that controls the network.

_______ is the software that controls the network.




a. Network Operating System
b. Client Operating System
c. Embedded Operating System
d. Network Control System
e. Network Software System



Answer: A

A peer-to-peer LAN:

A peer-to-peer LAN: 




a. has more capability than a dedicated server
b. supports a higher number of computers than a dedicated server
c. is generally cheaper in hardware and software than a dedicated server
d. is not appropriate for sharing resources in a small LAN
e. is often much faster than dedicated server networks



Answer: C

Which of the following is not given to a client computer when it is first installed on a TCP/IP network so that it has the appropriate routing/addressing information?

Which of the following is not given to a client computer when it is first installed on a TCP/IP network so that it has the appropriate routing/addressing information? 



a. application layer address
b. subnet mask
c. its own IP address
d. IP address of its DNS server
e. IP address of a gateway, router, or a switch outside of its subnet



Answer: A

One drawback to dynamic routing is:

One drawback to dynamic routing is: 




a. Routing usually does not reflect changing network conditions, such as computers that are overloaded by many messages
b. It cannot be used with non-government networks
c. The transmission of status information "wastes" network capacity that could be used to send user messages
d. It is the job of the network manager, not the computers or devices themselves, to maintain the routing table.
e. It requires less processing by each computer than static routing.



Answer: C

_________ refers to the type of routing in which the routing table is developed by the network manager and modifications are made only when computers are added to or removed from the network.

_________ refers to the type of routing in which the routing table is developed by the network manager and modifications are made only when computers are added to or removed from the network. 




a. Adaptive routing
b. Dynamic routing
c. Static routing
d. Distance vector routing
e. Link state routing



Answer: C

An advantage of centralized routing is:

An advantage of centralized routing is: 




a. routing does reflect changing network conditions, such as computers that are overloaded by many messages
b. if anything happens to the computer developing the routing table, the routing tables cannot be changed until that computer is fixed, or until a new computer is selected to perform the function
c. routing decisions are simple
d. the routing tables are stored at all computers in the network
e. it requires more processing by each computer or router in the network than dynamic routing



Answer: C

The three fundamental approaches to routing are:

The three fundamental approaches to routing are: 



a. circuitous, flat, and direct routing
b. connectionless, static, and connection-oriented
c. subordinate, master, and insubordinate routing
d. host, client, and client-server routing
e. centralized, static routing, and dynamic routing


Answer: E

In its simplest form, the __________ has two columns: the first column lists every computer and device in the network, while the second column lists the computer or device to which that computer should send messages, if they are destined for the computer in the first column.

In its simplest form, the __________ has two columns: the first column lists every computer and device in the network, while the second column lists the computer or device to which that computer should send messages, if they are destined for the computer in the first column. 



a. linking loader
b. routing table
c. configuration listing
d. bus header assignment list
e. file allocation table



Answer: B

Server name resolution is done using the:

Server name resolution is done using the:



a. Address Resolution Protocol
b. Border Gateway Protocol
c. Internet Control Message Protocol
d. Routing Information Protocol
e. Domain Name Service



Answer: E

Dynamic addressing:

Dynamic addressing: 



a. assigns a permanent network layer address to a client computer in a network
b. makes network management more complicated in dial-up networks
c. has only one standard, bootp
d. is always performed for servers only
e. can solve many updating headaches for network managers who have large, growing, changing networks



Answer: E

A client computer is assigned a data link layer address is by:

A client computer is assigned a data link layer address is by: 



a. hardware manufacturers
b. software manufacturers
c. middleware manufacturers
d. network managers who configure a file in a computer's network layer software package
e. ISO



Answer: A

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

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



a. running out of address space to support the growth of the Internet
b. has a 20 byte header
c. has an increased address size from 32 bits to 128 bits
d. does not include version number in its header
e. does not include hop limit in its header



Answer: C

IP:

IP: 




a. performs packetizing functions
b. does not have a header
c. is currently in use with only one packet form or structure
d. performs routing functions
e. performs error control functions



Answer: D

TCP/IP:

TCP/IP: 



a. is the least commonly used network protocol for LANs because it cannot be combined with Ethernet
b. performs packetizing, as well as routing and addressing functions
c. is not very efficient and is prone to errors
d. is compatible with only one type of data link protocol, SDLC
e. refers to Telephone Control Procedures/Inter-exchange Procedures



Answer: B

_______ is not an important function of the transport layer.

_______ is not an important function of the transport layer. 



a. end-to-end delivery of the message
b. taking messages from the application layer
c. routing
d. breaking long messages into smaller packets
e. interfacing with the network layer



Answer: C
Subscribe to: Posts (Atom)