Question 1

Which of the following is NOT a characteristic of a bridge?

Accepted Answer

This statement is incorrect as there can be multiple LANs interconnected by a number of bridges. Bridges can be used to create larger network topologies with multiple interconnected LANs.

Question 2

The tree layout begins at a point known as the ________.

Accepted Answer

The answer of The tree layout begins at a point...

Question 3

LDPC codes exhibit performance in terms of bit error probability that is very close to the ________ limit and can be efficiently implemented for high-speed use.

Accepted Answer

The answer of LDPC codes exhibit performance in terms of...

Question 4

In the ________ topology each station is directly connected to a common central node,typically via two point-to-point links,one for transmission and one for reception.

Accepted Answer

The answer of In the ________ topology each station is...

Question 5

The key elements of a local area network are medium access control,transmission medium,wiring layout,and ________.

Accepted Answer

The answer of The key elements of a local area...

Question 6

The term ________ means that all users share a common MAC broadcast address.

Accepted Answer

A flat network architecture, also known as a flat network or a single subnet, is a network design where all devices on the network share a common IP address range and a single broadcast domain with a common MAC address. This allows all devices to communicate with each other without the need for routing between subnets or VLANs.

Question 7

The ________ topologies are passive sections of cable to which stations are attached.

Accepted Answer

Both tree and bus topologies are passive sections of cable to which stations are attached. Tree topology has a hierarchy of cables branching out from one main cable while bus topology has a single cable to which all stations are connected in a linear manner. Ring topology, on the other hand, has stations connected in a circular manner with packets circulating around the ring. Star topology has all stations connected to a central hub or switch, which actively manages the network traffic.

Question 8

The principle disadvantage of VLAN "membership by port group" is that ________.

Accepted Answer

The principle disadvantage of VLAN "membership by port group" is that the network manager must reconfigure VLAN membership when an end system moves from one port to another. This can lead to administrative overheads and potential errors if not managed correctly. Option A is incorrect as it refers to "VLAN tagging" which examines portions of the MAC frame above the MAC layer, and is not specifically related to "membership by port group". Option B is not a disadvantage, but rather a requirement for any VLAN deployment. Option C is also incorrect as "membership by port group" is considered to be relatively easy to configure.

Question 9

The ________ topology is a special case of the tree topology,with only one trunk and no branches.

Accepted Answer

The answer of The ________ topology is a special case...

Question 10

In the ________ topology the transmission medium is a branching cable with no closed loops.

Accepted Answer

The tree topology is characterized by a branching cable structure with no closed loops, making it the best fit for the given description. A bus topology consists of a single cable connecting all devices, a linear topology is a variation of bus topology where endpoints meet to form a closed loop, and a ring topology consists of a closed loop formed by a single cable with all devices connected to it.

Question 11

The key parameters in any medium access control technique are ________.

Accepted Answer

The answer of The key parameters in any medium access...

Question 12

The ________ specifies the mechanisms for addressing stations across the medium and for controlling the exchange of data between two users.

Accepted Answer

LLC (Logical Link Control) is responsible for identifying devices on the network and providing error control and flow control between them. It specifies the mechanisms for addressing stations across the medium and for controlling the exchange of data between two users. The MAC (Media Access Control) layer is responsible for controlling access to the physical medium, while LAN (Local Area Network) is a network that connects computers and devices in a geographically limited area. PDU (Protocol Data Unit) refers to a unit of data that is transmitted between protocols, but it is not specific to the mechanisms for addressing and controlling data exchange between devices.

Question 13

The central element of the star topology is a ________.

Accepted Answer

The central element of the star topology is a hub. All other nodes connect directly to the hub, and communication between nodes goes through the hub. Switches can also be used in place of hubs, but hubs are the more common choice for small networks. Routers and subnetworks are not relevant to the star topology.

Question 14

The term ________ refers to the way in which the end points,or stations,attached to the network are interconnected.

Accepted Answer

Topology refers to the way in which the end points or stations of a network are interconnected. It defines the physical or logical arrangement of nodes in a network. Control link is a component of a network that carries control information. Medium refers to the physical substance or channel that carries the signals between the nodes. Medium access link is a protocol that governs how nodes access the medium.

Question 15

There are four alternative media that can be used for a bus LAN: baseband coaxial cable,broadband coaxial cable,optical fiber,and ________.

Accepted Answer

The answer of There are four alternative media that can...

Question 16

The network consists of a set of ________ joined by point-to-point links in a closed loop in the ring topology.These are capable of receiving data on one link and transmitting them,bit by bit,on the other link as fast as they are received.

Accepted Answer

The answer of The network consists of a set of...

Question 17

The total collection of devices that receive broadcast frames from each other is referred to as a ________.

Accepted Answer

The answer of The total collection of devices that receive...

Question 18

A ________ consists of a shared transmission medium and a set of hardware and software for interfacing devices to the medium and regulating the orderly access to the medium.

Accepted Answer

The answer of A ________ consists of a shared transmission...

Question 19

In the ________ all stations attach directly to a linear transmission medium.A transmission from any station propagates the length of the medium in both directions and can be received by all other stations.

Accepted Answer

This description matches the characteristics of bus topology, where all devices are connected to a central cable or backbone. Any signal transmitted by any device propagates throughout the entire network and can be received by all other devices.

Question 20

A ________ is a broadcast domain consisting of a group of end stations,perhaps on multiple physical LAN segments,that are not constrained by their physical location and can communicate as if they were on a common LAN.

Accepted Answer

The answer of A ________ is a broadcast domain consisting...

Quiz 11: Local Area Network Overview