Key terminology 1.5

Question 1

Star network topology

Answer 1

Multiple nodes connected to a central switch or server.

Question 2

Mesh network topology

Answer 2

Multiple nodes, switches or routers all connected to one another.

Question 3

Wi-Fi

Answer 3

A wireless connection to a network requiring a WAP. Data is sent across specific frequencies called channels.

Question 4

Frequency

Answer 4

The number of times a unit is repeated per unit of time.

Question 5

Channel

Answer 5

A signal frequency on a Wi-Fi connection.

Question 6

Encryption

Answer 6

Encoding plain text into cipher text using an encryption key

Question 7

Ethernet

Answer 7

A standard for creating a LAN with protocols. Data is transmitted as frames.

Question 8

Frame

Answer 8

Another name for a packet of data. Contains:
Source address
Destination address
Date
Sequence number
Error checking number

Question 9

IP address

Answer 9

Internet Protocol Address: a unique string of numbers which identifies each computer on a network.

Question 10

MAC address

Answer 10

Media Access Control Address: a unique identifier for an NIC.

Question 11

Protocol

Answer 11

A set of rule governing how two devices communicate.

Question 12

TCP/IP

Answer 12

Transmission Control Protocol / Internet Protocol: TCP manages packets at the source and destination of data and IP manages the transmission of packets between them.

Question 13

HTTP

Answer 13

Hypertext Transfer Protocol: a method of requesting data from web servers.

Question 14

HTTPS

Answer 14

HTTP Secure: used to encrypt sensitive web pages or data when being requested from a web server.

Question 15

FTP

Answer 15

File Transfer Protocol: used for sending files between computers.

Question 16

POP

Answer 16

Post Office Protocol: used by clients to receive emails from mail servers.

Question 17

IMAP

Answer 17

Internet Message Access Protocol: used by clients to receive emails from mail servers and store the emails so that they can be seen on any device.

Question 18

SMTP

Answer 18

Simple Mail Transfer Protocol: allows mail servers to communicate and send emails between them.

Question 19

Packet switching

Answer 19

TCP splits data into packets.
IP directs them along different routes.
TCP reassembles them at their destination.

Question 20

Layers

Answer 20

Application layer: HTTP, HTTPS, SMTP, POP, IMAP

Transport layer: TCP

Internet layer: IP

Network access layer: Ethernet protocols and Wi-Fi protocols