1.3.3 Networks

?
  • Created by: Zruixx
  • Created on: 29-03-23 09:53
What is a Network?
A network is the name given to two or more computers connected together with the ability to transmit data between each other
1 of 30
What is a LAN?
A Local Area Network is the name given to a network which is spread over a small geographical area or a single site
2 of 30
What is a WAN?
A Wide Area Network is the name given to a network which is spread over a large geographical area
3 of 30
What is Physical Network Toplogy?
The physical layout of the wires and components which form the network
4 of 30
What is Logical Network Topology?
The layout which shows how data flows
5 of 30
What is Star Topology?
Star Topologies use a central node, often a switch, to direct data through the network. Every device on the network is connected to the switch
6 of 30
What are the Advantages of Star Topology?
- Performance is consistent
- If one cable fails, only that station is affected
- Easy to add new stations
7 of 30
What are the Disadvantages of Star Topology?
- Expensive due to switch and cabling
- If the central switch fails, the rest of the network fails
8 of 30
What is Mesh Topology?
In Mesh Topology, every node is connected to every other node
9 of 30
What are the Advantages of Mesh Topology?
- If the network is wireless, there is no cabling cost
- As the number of nodes increase, the reliability and speed of network become better
- Nodes are automatically incorporated
- No central switch which improves speed
10 of 30
What are the Disadvantages of Mesh Topology?
- If using a wireless network, devices with wireless capability must be purchased
- If using a wired network, a large quantity of cable is required
- Maintenance is difficult
11 of 30
What is a Protocol?
A protocol is a set of rules defining how two computers communicate with each other
12 of 30
What is the TCP/IP Stack?
The TCP/IP is a stack of networking protocols that work together passing packets during communication
13 of 30
What does the Application Layer do?
The specifies the protocol that needs to be used in order to relate the application that's being sent
14 of 30
What does the Transport Layer do?
-Establishes end-to-end connection between the source and the recipient computer
- Splits data into packets and labels them with a packet number
15 of 30
What does the Network Layer do?
- Adds the source and destination IP addresses
- Routers use IP addresses and sockets to forward the packets to the specified destination
16 of 30
What does the Link Layer do?
Adds MAC address identifying the Network Interface Cards of the source and destination computers
17 of 30
What is DNS?
The Domain Name System is the system used to name and organise internet resources
18 of 30
What are Data Packets?
Packets are segments of data which contain a:
- Header (Protocols, IP addresses)
- Payload (Raw Data)
- Trailer (Checksum)
19 of 30
What is Packet Switching?
Packet Switching is a method of communication in which data is communicated using packets across a network
20 of 30
What is Circuit Switching?
Circuit Switching is a method of communication where a direct link is created between two devices. The link is maintained for the duration of the entire conversation between devices.
21 of 30
What is a Firewall?
A Firewall is a device designed to prevent unauthorised access to a network. It consists of two NICs between the user and the internet
22 of 30
What is a Proxy?
A Proxy server acts as an intermediary, collecting and sending data on behalf of a user. The privacy of the user is protected and help to reduce web traffic.
23 of 30
What is a NIC?
A Network Interface Card is the card required to connect a device to a network. Built into a device and assigns a unique Media Access Control address to each device.
24 of 30
What is a Switch?
A switch is a device used to direct the flow of data across a network
25 of 30
What is a WAP?
A Wireless Access Point which allows a device to connect to a network. Commonly combined with a router to enable internet access
26 of 30
What is a Router?
A router is used to connect two or more networks together
27 of 30
What is a Gateway?
A gateway is used when protocols are not the same between networks. It translates the protocols so that networks can communicate.
28 of 30
What are Client-Server Networks?
Client-Server networks consist of terminals known as clients connected to a server. The server is a powerful, central computer.
29 of 30
What are Peer-to-Peer Networks?
A network in which computers are connected to each other so that they can share files. Each device acts as both a server and a client
30 of 30

Other cards in this set

Card 2

Front

What is a LAN?

Back

A Local Area Network is the name given to a network which is spread over a small geographical area or a single site

Card 3

Front

What is a WAN?

Back

Preview of the front of card 3

Card 4

Front

What is Physical Network Toplogy?

Back

Preview of the front of card 4

Card 5

Front

What is Logical Network Topology?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Computing resources:

See all Computing resources »See all 1.3.3 Networks resources »