Question

Networking

This week we focus on introducing Networking & Terminologies.

Answer the following Questions?

1. What is a Network? outline the two network media you know?

2. Why do we setup a network?

3. What does ISO do?

4. Name the various network typologies you learned about in class?

5. What doe LAN stand for?

Practical you did in class?

· What command did you use to get your IP address?

o What command did you use to get your public IP address?

· What is the difference between a Router and a Switch ?

Answer 1

Question 1

1. What is a Network? outline the two network media you know?

Ans: A computer network is a telecommunication network that makes the sharing of resources and information possible and makes communication possible through the network media between the configured devices on the network.

Network media is the communication channel that carries the signals from one point to another in the network

Two different types of media are

1.Wired media

• Coaxial cables
  • one copper wire in the center which acts as one conductor which is surrounded by an insulator element and over that a cylindrical covering which acts as both another conductor and protective layer
  • Coaxial cables can conduct up to 100 Mbps
• Twisted pair cables
  • Pair of wires in twisted form carries media, the intention behind twisting is to reduce cross talk.
  • Ethernet cables are one type of twisted-pair cables
  • Two types are Shielded Twisted pair cable (STP) which has a metallic protective layer and unshielded twisted pair cable (UTP) which doesn't have that layer.
• Fiber optic cable
  • Uses light rather than electronic signals
  • MAke use of total internal reflection to transmit data.

2.Wireless media

• Radio-frequency signal
  • Wifi signal is an example of this.

Question 2

Ans: The main purpose of creating a network is to make communication possible over the devices on the network.

• But the ability of networks is more advanced than just communication
• A computer network allows resource sharing which allows more than one device to share a single resource which can be a storage device, printer or any other peripheral device which can reduce the overall cost of the network
• Not only sharing but also Computer network services like Active Directory domain services allow the administrator to manage the users and resources of the network with all the administrative power so that the manageability of a large number of devices and their users can be made easier than ever.

Question 3

Ans: ISO Stands for International Organisation for standardization which is a worldwide proprietary, industrial and commercial standards.

In the context of networking The Open systems interconnection model (OSI model) is developed by the ISO which sets a standard for the network devices so that they can be interconnected with all the other devices regardless of their manufacturer differences or changes in specifications.

Question 4

Ans:

Network topologies are the different arrangments to connect computers and devices on the network, different topologies are

1.Point to point (Connect two computers with an ethernet cable)

2. Bus Topology (devices share single backbone cable, no central hub)

3.Star topology( Device are connected to a central hub)

4.Ring topology(All the devices are connected to their nearest two devices like a ring)

5.Mesh topology(All the devices are connected to each other)

6.Tree topology (Also known as hierarchical topology which inherits the properties of both star and bus topology)

Question 5:

Ans: LAN stands for Local area network which is a computer network that has a size to covers a small organization or a single building

Question 6:

Command to find the IP address: C:\> ipconfig

Command to find public IP: There is no built-in command to find the public IP but we can use the following command instead

C:\>nslookup myip.opendns.com. resolver1.opendns.com

Question 7:

Both Switch and router are network devices but both are doing different jobs and functions

OSI layers

The switch is a layer two device where the router is a Layer 3 device

Form of data

Switch transmit data in the form of frames where the router transmits data as packets

Addresses

The switch uses MAC address on the frames to transfer them where router uses the IP address to route the packets

Tables

The switch stores the information on CAM table where routing table is used in routers

Broadcast domain

The switch has a single broadcast domain until VLAN is configured whereas router has a different broadcast domain for different ports