4th Sem Networks Lab

1. 1. What are the seven layers of OSI?
Physical Layer, Data Link Layer, Network Layer, Transport Layer, Session Layer, Presentation
Layer, Application Layer.
2. Difference between router and switch?
Router is a layer three device which works based on software, switch is a layer two device whose
working is based on the hardware of the device. Switch is faster than routers
3. What is the use of PING command?
PING command is used to check the connectivity between two nodes in the network
4. Difference between LAN and WAN.
LAN is typically a small network with upto a maximum of few hundred nodes, More than one LAN
connected with each other and to the internet is called WAN
5. Difference between Internet and Intranet.
Internet is a world-wide / global system of interconnected computer networks. Intranet is system in
which multiple PCs are connected to each other. PCs in intranet are not available to the world
outside the intranet.
6. What is called a Link?
A network can consist of two or more computers directly connected by some physical medium such
as coaxial cable or optical fiber. Such a physical medium is called as Link.
7. What is called a Multiple Access?
If the physical links are shared by more than two nodes, it is said to be Multiple Access.
8. What is called a protocol?
A protocol is a set of rules that govern all aspects of information communication.
9. What is Round Trip Timer?
The duration of time it takes to send a message from one end of a network to the other and back, is
called RTT
10. What is an IP Address?
A unique string of numbers separated by full stops that identifies each computer using the Internet
Protocol to communicate over a network.