Data is transmitted several bits at a time using multiple wires.

Keyboard and Mouse are examples of...

Bandwidth is the term used to describe the amount of data that can be transmitted along a communication channel.

Bandwidth is measured in BPS

Bandwidth is measured in Hz

Bit rate and bandwidth are always closely linked. Because the bit rate will be limited by how much bandwidth is available.

Bit rate and Latency are always closely linked. Because the bit rate will be limited by how much latency is present in the network cable.

Bit Rate is measured in Bits per second

Bit Rate is measured in Bytes per second

Latency is the time delay that occurs when transmitting data between devices.

Latency represents one electronic state change per second.

Data is transmitted where the pulse of the clock of the sending and receiving device are in time with each other.

Data is transmitted between 2 devices that do not share a common clock signal.

Contains a start bit, stop bit and parity bit.

In Asynchronous Data Transmission - A Bit used to indicate the start of a unit of data .

In Asynchronous Data Transmission - a bit used to indicate the end of a unit of data.

In Asynchronous Data Transmission - a method of checking binary codes by counting the number of 1s and 0s

Are methods of ensuring that different computers can communicate with each other. Is a set of rules

is used for accessing and receiving web pages in the form of HTML files on the Internet

The protocol requests the web server to upload the requested web page to the user’s browser for viewing

used for accessing and receiving web pages in the form of HTML files on the internet.

+encrypts the information so that it cannot be hacked

Protocol that allows a user on one computer to log into another computer that is part of the same network.

Email protocol used for transferring email between remote email servers

These 2 email retrieval protocols fetch message data and attachments from your remote mail server

Which protocol will download entire message to just one electronic device and remove from email server?

Breaks up messages sent over the Internet into small chunks called packets.

Reassembles the packets at the other end.

Detects errors.

Resends lost messages.

Breaks up messages sent over the Internet into small chunks called packets.

Reassembles the packets at the other end.

Detects errors.

Resends lost messages.

•Routes the individual packets

SELECT ALL the layers of TCP/IP protocol stack that incoming and outgoing data move through /operate on...

Which layer do application run on ?

Which layer creates a connection between 2 hosts and agrees data to be sent (size of data (packets) etc) and breaks up data into packets.

Which layer DO routers operate on...

Which layer does Destination addresses get written on to the packets ready for transmission

Layer where the physical hardware that connects the two hosts such as the NIC and the cabling operate on...

UDP just sends the packets, which means that it has much lower bandwidthoverhead and latency. But packets can be lost or received out of order as a result, owing to the different paths individual packets traverse between sender and receiver.

UDP is an ideal protocol for network applications in which perceived latency is critical such as gaming, voice and video communications, which can suffer some data loss without adversely affecting perceived quality. In some cases, forward error correction techniques are used to improve audio and video quality in spite of some loss.

TCP is an ideal protocol for network applications in which perceived latency is critical such as gaming, voice and video communications, which can suffer some data loss without adversely affecting perceived quality. In some cases, forward error correction techniques are used to improve audio and video quality in spite of some loss.

The person receiving the file

The person sending the file

Packets can get lost if they are sent down different routes

Which piece of Packet Header data allows your computer to reassemble the data?

Which piece of Packet Header data ensures the packet goes to the correct computer?

Malware is the term used to refer to a variety of hostile or intrusive software

Malware is the term used to describe mail that is phishing for personal data.

Select ALL the malware

A computer ****** is one type of malware (malicious software) which is installed without your knowledge, with the purpose of doing harm . A ******** is a program which infects (embeds itself in) other programs or data files. It is easily spread if a user innocently sends an infected file to someone else

•A ******* is a type of malware

•It is a standalone program that does need to attach itself to an existing program in order to spread

•may open a “back door” into your computer system through which your personal information can be harvested.

•It can also use your computer power and network bandwidth to send thousands of spam emails to others.

Which cannot self replicate?

Spyware is software that gathers information about a person or organisation without their knowledge?

Spyware is a standalone program that does need to attach itself to an existing program in order to spread

Which is NOT illegal

Which is used by created by company's such as google and amazon?

attack is an attempt to make an online service unavailable by overwhelming it with traffic from multiple sources.