COMPUTER NETWORKS(Mid sem exam question by MJP ma`am)

1.  Explain the functionality of star topology ,also write down the advantages and disadvantages of star topology.
2.  Write a short note on following
1. Mesh topology
2. Bus topology
3.  Write down advantages and disadvantages of ring and tree topology.
4.  Write short note on following
1.  Print server
2.  File server
5.  Explain the functionality of each layer of OSI model in detail.