Data transmission

Question 1

Describe Serial Transmission

Answer 1

Bits, bytes and packets are sent sequentially

bits received sequentially until full bytes and packets are re-assembled

Question 2

Describe Parallel Interconnect

Answer 2

All bits transferred and received concurrently

Question 3

Describe the characteristics of Serial Transmission

Answer 3

One bit comes after another, one by one
slower
farther

Question 4

Describe the characterisitcs of Parallel Processing

Answer 4

All bits in a single character and transmit simultaneously

Faster

Shorter

Question 5

Cable Description of Serial tranmsmission

Answer 5

All bits travel down a single wire, one bit at one time

Question 6

Cable transmission of Parallel Transmission

Answer 6

Each bit travel down its own wire simaltenously with other bits

Question 7

Application of Serial Tansmission

Answer 7

Between two computers, from computer to external device, and local and wide network

Question 8

Application of Parallel Transmisssion

Answer 8

within a computer along computer busses , between drive controller to hard drive

Question 9

Explain the need of Multiplexing

Answer 9

Sometimes multiple devices need to send a signal along the same communication medium at the same time.

Multiplexer is needed for this

Question 10

Explain multiplexer

Answer 10

a multiplexed receives signals from a lot of different sources and can then send the signals along a single communications channel to a single destination using a number of different techniques

At receiving end, the signals are then separated back out

Question 11

Advantages of Multiplexing

Answer 11

Greatly increase the amount of data that can be sent across a network in a particular amount of time

reduces the cost of the infrastructure of a network

reduction of network collisions

Question 12

Define a protocol stack

Answer 12

Number of protocols chained together are known as a protocol stack

Question 13

Advantages of protocol stacks

Answer 13

Seperation of logic so problems in single protocol can be dealt with in isolation

More flexibility when choosing what properties you want your network to have

More flexibility when choosing what properties you want your network to have.

Question 14

Expand TCP

Answer 14

Transmission Control Protocol

Question 15

Expand IP

Answer 15

Internet protocol

Question 16

TCP/IP four layer model

Answer 16

Application Layer
Transport Layer
Network/Internet Layer
Link/Network access layer

Question 17

What are the four steps of sending packets of data over the internet using TCP/IP

Answer 17

Application Layer:
Data is encoded during this step

transport Layer:
Data is split into packets and port
information is added.

Network Layer:
The IP information is added to the
Packet (to and from).

Data Link Layer:
This adds the MAC address
information (to and from).

Question 18

Define the Ethernet

Answer 18

is a system for connecting a number of computer systems to form a Local Area Network with protocols to control the
passing of information and to avoid simultaneous transmission by two or more
systems

Question 19

Three methods of routing traffic on a network

Answer 19

NIC/WIC
Hub/Switch
Router

Question 20

Expand NIC

Answer 20

Network Interface Card

Question 21

Expand WIC

Answer 21

Wireless interface card

Question 22

Explain NIC

Answer 22

Responsible for placing packets onto the network cable(copper or fibre optic)

Built onto the motherboard

Question 23

Explain Wireless Interface Card

Answer 23

Most devices bar desktop computers have

Wireless Interface Cards built onto the motherboard.

The uses electronic waves to transmit data.

Must comment to a Wireless Access Point to allow it to

connect to a wired network.

Question 24

Features of Hub/Switch

Answer 24

Switches can perform error switching before forwarding data, which are very efficient by not forwarding packets that error -end out or forwarding good packets selectively to correct devices only

can support both layer 2 and layer 3 depending on the type of switch

usually, large networks use switches instead of hubs to connect computers within the same subset

Question 25

Define Mutliplexing

Answer 25

The process of combining and transmitting multiple signals over a communications link at the same time as a single, complex signal.