Network Questions

1)      Define data and singals.

2)      Briefly describe following characteristics of a sine wave.

a.       Amplitude

b.      Frequence

c.       Phase

3)  What is wave length?

4)      Explain the difference between Client-Server and Peer-to-Peer networks.

5)      Explain the  three main network topologies (i.e. bus, ring, star) and  list two                    

 advantages and two disadvantages of each of them.

6)      What is a protocol? Give two examples.

7)      State the function of each layer in OSI model.

8)      What are the two components of an IP adder?

9)      Explain the three main classes of IP.

10)  Briefly describe the functions of the following devices.

a.  Switch

b.  Router

c.  Hub

11)    Define following

a.       Computer security

b.      Network security

c.       Internet security

12)    Define followings

a.       Cryptography

b.      Plain text

c.       Cipher text

d.      Encryption

e.       decryption

f.       Key

g.       Symmetric keycryptography algorithms

h.      Asymmetric Key cryptography algorithms.

i.        Firewall

13)      What are the three types of keys in cryptography?

 Explain the difference between Client-Server and Peer-to-Peer networks.

Peer-to-Peer

Client-Server

·         Easy to install and configure. ·         No dedicated server required. ·         Users control their own resources. ·         Inexpensive to purchase and operate. ·         No specialist software required. ·         No dedicated administrator to run the network required. ·         Difficult to employ security. ·         Too many passwords for shared resources. ·         Backups difficult to manage. ·         No centralization. ·         Limited users.

·         Centralized user accounts, security and access controls simplify network administration. ·         More powerful equipment means more efficient access network resources. ·         Single password login, means access to all resources. ·         Supports greater numbers of users, or networks where resources are heavily used ·         More costly to install and maintain. ·         Single point of failure, server goes down, the network goes down. ·         Complex special-purpose software requires appointment of expert staff, increasing costs. ·         Dedicated hardware and software increases costs.