(i) Give two advantages and two disadvantages of star topology
OR
Define the following terms:
www, web hosting
(ii) How is packet switching different from circuit switching?
Answer
(i) Advantages
- Ease of service
- Centralized control
- Easy to diagnose faults
- One device per connection
Disadvantages
- long cable length
- difficult to expand
- central node dependency
OR
www: a set of protocols that allow you to access any document on the internet through the naming systems based on URLs
Web hosting: Web hosting is a service that allows organizations and individuals to post a website or web page onto the server, which can be viewed by everyone on the Internet.
(ii) Packet switching:
- uses store and forward concept to send messages
- no physical path is establishes
- the message is divided into smaller parts, known as packets, and then sent forward
- the tight upper limit on block size
- Each data unit knows only the final receiver’s address
Circuit switching :
- physical connection is established between sender and receiver
- Each data unit knows the entire path from sender to receiver
- It does not follow store and forward concept