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**Q1:**
Explain the network categories: LAN, MAN, and WAN with diagrams and suitable examples for each that determine their communication systems.

(b) You have two computers connected by an Ethernet hub at home. Is this a LAN, a MAN, or a WAN? Explain your reason. (3 Marks)

**Q2:**
Give a brief history of the Internet and the Internet Service Providers (ISP). (2 Marks)

**Q3:**
Discuss the functions of the layers of the OSI model along with its diagram. (3 Marks)

**Q4:**
Match the following to one or more layers of the OSI model: (2 Marks)
a. Route determination
b. Flow control
c. Interface to transmission media
d. Provides access for the end user

**Q5:**
(a) Compare analog signal with digital signal.
(b) Show the comparison of periodic and aperiodic signals in data communication. (3 Marks)

**Q6:**
Discuss transmission impairment and its causes. (2 Marks)

**Q7:**
What are the types of errors? Discuss the concept of error detection. (3 Marks)

**Q8:**
Discuss the characteristics of classful addressing and classless addressing. (2 Marks)

Answer :

Final answer:

Network categories LAN, MAN and WAN, are differentiated by their size, or the area they cover. The Internet was a project developed in the 1960s, and ISPs are the companies that provide us access to it. The OSI model's layers each have specific functions, and its role in error detection involves detecting single-bit and burst errors.

Explanation:

The different network categories - LAN, MAN, and WAN, refer to Local Area Network, Metropolitan Area Network, and Wide Area Network respectively. LAN typically refers to a network that covers a small area, like a home or office. Two computers connected by an Ethernet hub at home is an instance of a LAN. A MAN covers a larger area such as a city for example, such as cable TV networks. Finally, a WAN spans a large distance, it could cover a country or even several countries, like the Internet.

The Internet was originally developed in the 1960s as ARPANET, a project funded by the DTIC and implemented by UCLA and Stanford. Internet Service Providers, or ISPs, are companies that provide internet access to consumers and businesses.

The layers of the OSI model include the physical layer, the data link layer, the network layer, the transport layer, the session layer, the presentation layer, and the application layer. Each has specific functions to ensure smooth network communication. Lastly, concerning error detection in networking, two common types are single-bit error and burst error. Error detection is the process of detecting these errors during transmission.

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