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Networks Summary

The document provides an overview of computer networks, defining key concepts such as nodes, routers, and network interface cards. It discusses the reasons for having networks, their disadvantages, and compares LAN and WAN. Additionally, it covers communication hardware, media, protocols, and various network topologies, including their advantages and disadvantages.

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5 views3 pages

Networks Summary

The document provides an overview of computer networks, defining key concepts such as nodes, routers, and network interface cards. It discusses the reasons for having networks, their disadvantages, and compares LAN and WAN. Additionally, it covers communication hardware, media, protocols, and various network topologies, including their advantages and disadvantages.

Uploaded by

neoyameakoonyatse
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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COMPUTER NETWORKS SUMMARY

SPECIFIC OBJECTIVE CONTENT


1. Define networks - Network: connection of 2 or more computers to share
concepts resources
- Node: device connected on the network
- Router: takes packages to their specific destination
- Network Interfaces card: identifies a node on the network
2. State reasons for having - For communication
networks - Sharing of hardware
- Sharing of software
- Sharing of files and data
3. List disadvantages of - Viruses
having networks - Hacking
- Networks are expensive to set up
4. Identify difference LAN WAN
between LAN and WAN - Covers a small area Covers a large area
5. Describe communication - modems, routers, Wi-Fi cards, network interface cards, Internet
hardware adapters, access points and network connectors
6. Describe communication - Means of delivering or receiving data
media
7. Compare suitability of - Transmission media is a pathway that carries the information
transmission media from sender to receiver
- Simplex: data is sent from sender to receiver only
- Half duplex: data is sent from sender to receiver and back to
sender but one direction at a time
- Duplex: data is send form sender to receiver and back to
sender at the same time
8. Define the term protocol - Rules that govern nodes communication and transfer of data
in a network
9. Describe the need for - File sharing
network protocol - Communication
10. Describe with the aid of RING
diagrams types of
network topologies
11. State the advantages
and disadvantages of
each topology

Advantages

1
COMPUTER NETWORKS SUMMARY

 Transmission of messages around the ring is relatively simple.


 Each node controls transmission to and from itself. Very high
transmission rates are possible because there are no data collisions.
Disadvantages
 If a part of the ring communication line breaks, then all the devices
will be affected.
 Adding and removing of nodes disrupt the network

BUS/ LINE

Main cable

Advantages
- One node being down does not affect other nodes
- Easy to remove a node
Disadvantages
- When main cable is down the whole network does not work
- Expensive to setup

2
COMPUTER NETWORKS SUMMARY

STAR

Advantages
- One node being down does not affect other nodes
- Easy to troubleshoot
- Easy to remove a node
Disadvantages
- Uses a lot of cables
- Expensive to setup
- When hub is down the whole network wont function

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