Question 1

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

Accepted Answer

A) fiber 
B) infrared frequencies 
C) coax cable 
D) unshielded twisted pair 
E) shielded twisted pair 
A) fiber 
B) infrared frequencies 
C) coax cable 
D) unshielded twisted pair 
E) shielded twisted pair A

Question 2

Describe in detail the difference between a hub and a switch in a LAN. Draw a diagram of each, and then mark it to show some of the points that you have made in your discussion of the differences. Discuss the difference between shared Ethernet and switched Ethernet in light of your answer.

Accepted Answer

A hub and a switch are both networking devices used in a Local Area Network (LAN) to connect multiple devices together. However, they operate in different ways and have different capabilities.

A hub is a simple networking device that works at the physical layer of the OSI model. It receives data from one device and broadcasts it to all other devices connected to the hub. This means that all devices on the network share the same bandwidth, and if multiple devices try to transmit data at the same time, collisions can occur, leading to decreased network performance.

On the other hand, a switch operates at the data link layer of the OSI model and is more intelligent than a hub. A switch learns the MAC addresses of the devices connected to it and only forwards data to the specific device it is intended for. This means that each device on the network has its own dedicated bandwidth, leading to better network performance and less chance of collisions.

Here is a diagram of a hub and a switch:

[Diagram]

In the hub diagram, all devices are connected to the hub, and the hub broadcasts data to all devices.

In the switch diagram, each device is connected to the switch, and the switch forwards data only to the intended device.

Now, let's discuss the difference between shared Ethernet and switched Ethernet in light of the differences between a hub and a switch. Shared Ethernet refers to the use of a hub in a network, where all devices share the same bandwidth and collisions can occur. Switched Ethernet, on the other hand, refers to the use of a switch in a network, where each device has its own dedicated bandwidth and collisions are minimized.

In conclusion, the main difference between a hub and a switch in a LAN is the way they handle data transmission. A hub broadcasts data to all devices, leading to shared bandwidth and potential collisions, while a switch forwards data only to the intended device, providing dedicated bandwidth and better network performance. This difference also affects the use of shared Ethernet with a hub and switched Ethernet with a switch in a LAN.

Question 3

Point Coordination Function requires that each station that wishes to transmit on the wireless network sends a request-to-transmit RTS) packet to the access point and waits for a clear-to-send CTS) packet from the AP before it can communicate with other nodes on the network.

Accepted Answer

A) True 
 B)False  True

Question 4

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

Accepted Answer

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 switch the frame to the correct circuit/computer. 
E) The switch chooses which frame to transmit first if it receives more than one frame destined for the same computer at the same time, and stores the other frames) temporarily. 
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 switch the frame to the correct circuit/computer. 
E) The switch chooses which frame to transmit first if it receives more than one frame destined for the same computer at the same time, and stores the other frames) temporarily.

Question 5

An) _____________ is used in a computer to connect it to a WLAN.

Accepted Answer

A) Ethernet NIC 
B) antennae 
C) wireless NIC 
D) access point 
E) hub 
A) Ethernet NIC 
B) antennae 
C) wireless NIC 
D) access point 
E) hub

Question 6

The maximum data rate of an 802.11g WLAN is

Accepted Answer

A) 24 Mbps 
B) 36 Mbps 
C) 11 Mbps 
D) 54 Mbps 
E) 9 Mbps 
A) 24 Mbps 
B) 36 Mbps 
C) 11 Mbps 
D) 54 Mbps 
E) 9 Mbps

Question 7

Network profile refers to what resources on each server are available on the network for use by other computers and which devices or people are allowed access on the network.

Accepted Answer

A) True 
 B)False

Question 8

11b provides three separate channels for indoor use in the U.S.that can be used for communication between the access point and other wireless devices on the network.

Accepted Answer

A) True 
 B)False

Question 9

The _____ contains the servers that are designed to serve data to customers and suppliers.

Accepted Answer

A) e-commerce edge 
B) SAN 
C) LAN 
D) domain controller 
E) bottleneck 
A) e-commerce edge 
B) SAN 
C) LAN 
D) domain controller 
E) bottleneck

Question 10

LDAP is an industry standard directory protocol.

Accepted Answer

A) True 
 B)False

Question 11

11a provides for speeds of up to 54 Mbps under perfect conditions.

Accepted Answer

A) True 
 B)False

Question 12

When a switch receives an Ethernet frame with a destination address that is not in its forwarding table, the switch will broadcast the frame out all of its other ports.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is not true about switched Ethernet?

Accepted Answer

A) The switch has a physical bus topology. 
B) It uses a switch instead of a hub. 
C) Most switches support full duplex circuits. 
D) It essentially provides a point-to-point connection between computers. 
E) It has forwarding tables in which entries are learned over time. 
A) The switch has a physical bus topology. 
B) It uses a switch instead of a hub. 
C) Most switches support full duplex circuits. 
D) It essentially provides a point-to-point connection between computers. 
E) It has forwarding tables in which entries are learned over time.

Question 14

Wired Ethernet is becoming a _______________ technology for small SOHO devices, meaning that manufacturers are no longer creating new products..

Accepted Answer

A) host 
B) legacy 
C) caching 
D) hub 
E) peak 
A) host 
B) legacy 
C) caching 
D) hub 
E) peak

Question 15

A switch always broadcasts all the packets it receives to all the computers that are connected to the switch.

Accepted Answer

A) True 
 B)False

Question 16

__________ antennas transmit the signal in all directions.

Accepted Answer

A) directional 
B) microware 
C) omnidirectional 
D) radio 
E) vertical 
A) directional 
B) microware 
C) omnidirectional 
D) radio 
E) vertical

Question 17

An access point AP) is required to connect a WLAN to a wired network.

Accepted Answer

A) True 
 B)False

Question 18

An access point plays the same role in a wireless network as a router does in a wired Ethernet network.

Accepted Answer

A) True 
 B)False

Question 19

Identify and describe the components of a data center.

Accepted Answer

A data center is a facility used to hous

Question 20

11b is a faster wireless standard than 802.11a.

Accepted Answer

A) True 
 B)False

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

Describe in detail the difference between a hub and a switch in a LAN. Draw a diagram of each, and then mark it to show some of the points that you have made in your discussion of the differences. Discuss the difference between shared Ethernet and switched Ethernet in light of your answer.

Point Coordination Function requires that each station that wishes to transmit on the wireless network sends a request-to-transmit RTS) packet to the access point and waits for a clear-to-send CTS) packet from the AP before it can communicate with other nodes on the network.

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

An) _____________ is used in a computer to connect it to a WLAN.

The maximum data rate of an 802.11g WLAN is

Network profile refers to what resources on each server are available on the network for use by other computers and which devices or people are allowed access on the network.

11b provides three separate channels for indoor use in the U.S.that can be used for communication between the access point and other wireless devices on the network.

The _____ contains the servers that are designed to serve data to customers and suppliers.

LDAP is an industry standard directory protocol.

11a provides for speeds of up to 54 Mbps under perfect conditions.

When a switch receives an Ethernet frame with a destination address that is not in its forwarding table, the switch will broadcast the frame out all of its other ports.

Which of the following is not true about switched Ethernet?

Wired Ethernet is becoming a _______________ technology for small SOHO devices, meaning that manufacturers are no longer creating new products..

A switch always broadcasts all the packets it receives to all the computers that are connected to the switch.

__________ antennas transmit the signal in all directions.

An access point AP) is required to connect a WLAN to a wired network.

An access point plays the same role in a wireless network as a router does in a wired Ethernet network.

Identify and describe the components of a data center.

11b is a faster wireless standard than 802.11a.

Introduction to Data Communications

Application Layer

Physical Layer

Data Link Layer

Network and Transport Layers

Network Design

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters

Exam 7: Wired and Wireless Local Area Networks

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

Describe in detail the difference between a hub and a switch in a LAN. Draw a diagram of each, and then mark it to show some of the points that you have made in your discussion of the differences. Discuss the difference between shared Ethernet and switched Ethernet in light of your answer.

Point Coordination Function requires that each station that wishes to transmit on the wireless network sends a request-to-transmit RTS) packet to the access point and waits for a clear-to-send CTS) packet from the AP before it can communicate with other nodes on the network.

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

An) _____________ is used in a computer to connect it to a WLAN.

The maximum data rate of an 802.11g WLAN is

Network profile refers to what resources on each server are available on the network for use by other computers and which devices or people are allowed access on the network.

11b provides three separate channels for indoor use in the U.S.that can be used for communication between the access point and other wireless devices on the network.

The _____ contains the servers that are designed to serve data to customers and suppliers.

LDAP is an industry standard directory protocol.

11a provides for speeds of up to 54 Mbps under perfect conditions.

When a switch receives an Ethernet frame with a destination address that is not in its forwarding table, the switch will broadcast the frame out all of its other ports.

Which of the following is not true about switched Ethernet?

Wired Ethernet is becoming a _______________ technology for small SOHO devices, meaning that manufacturers are no longer creating new products..

A switch always broadcasts all the packets it receives to all the computers that are connected to the switch.

__________ antennas transmit the signal in all directions.

An access point AP) is required to connect a WLAN to a wired network.

An access point plays the same role in a wireless network as a router does in a wired Ethernet network.

Identify and describe the components of a data center.

11b is a faster wireless standard than 802.11a.

Introduction to Data Communications

Application Layer

Physical Layer

Data Link Layer

Network and Transport Layers

Network Design

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters