Sample Exams Questions and Answers on Computer Networks

1. "The number of transistors per square inch on an integrated chip doubles every 18 months." This observation is known as ________ Law.

10) You are given the Class B network address: 172.25.0.0. From this network, if you needed to create 20 subnets, how many bits would need to be borrowed at a minimum and how many hosts could you have per subnet?

Why do you need to know the purpose of any communication you are sending and its Intended audience (1.1, 1.2) In what way does this affect the language you might use when producing written communication or information? (2.3)

• “Application - The Application Layer is the layer that most network users are exposed to, and is the level at which human communication happens. HTTP, FTP, and SMTP are examples of the application layer protocols the Patton-Fuller will now be utilizing for communicating electronically” (Network Design, 2012).

For problems 12 to 14, do the following: (a) Make a scatter diagram of the

The User Datagram Protocol (UDP) is defined for use with IP network layer protocol in the transport layer protocol. It provides a best-effort datagram service to an End System (IP host). It uses a simple connectionless transmission model with a minimum of protocol mechanism. It uses no handshaking dialogues, and thus the user's program is exposed to any unreliability of the underlying network protocol. There is no guarantee of delivery, ordering, or duplicate protection. UDP provides checksums for data integrity, and port numbers for addressing different functions at the source and destination of the datagram.

The internet layer is built up of four core protocols: IP, IGMP, ICMP and ARP. Internet protocol (IP) is responsible for routing, IP addressing and breakdown/reassembly of data packets, address resolution protocol (ARP) is responsible for mapping an IP address to a device on the local network, internet control message protocol (ICMP) provides diagnostic information and error reports on lost packets, internet group management protocol (IGMP) controls who receives IP datagrams in a single transmission. The transport layer is built up of two core protocols: TCP and UDP. Transmission control protocol (TCP) sequences and acknowledges packets sent and their recovery when lost in transmission allowing the computer to make and maintain network conversations where applications exchange data, defined as a connection-oriented protocol meaning the connection is maintained until the programs has finished exchanging data. User datagram protocol (UDP) This is used to transfer small amounts of data when the use of error correction isn’t needed increasing the speed of the transmission, common in multi-player video games as the user will not need to receive packets of past events in the game so the error correction featured in (TCP) would be

How would you define a network? What is bandwidth? What is a NIC? List three types of media used for network connections.

In general, on the internet, every packet follows 5 layers of structures (Application, Transport, Network, Data Link, and Physical). Since I have to talk about Connection-Oriented and Connectionless as a service, I will focus on the Transport layer because they are part of this layer. It allows multiple applications to use one network connection simultaneously, the layer will create ports on your computer allowing them to be reserved and used by the Application layer. Let's say that port 3600 will be used to send a message to port 80 of some other computer, whenever the port is ready to send a message, it passed on to Transport layer. In this layer, it wraps the message inside the Segment which contains some additional

The student shows comprehensive understanding of laws of exponents and their application. The work demonstrates correct setup and application of different rules that pertain to each problem. Manipulation of different components for each problem leads to correct answer.

Task 1: Describe the data communication types used historically and the developments that have led to modern day Local Area Networks (LANs). Detail any emerging technologies and where you think data communications are likely to be in ten year’s time.

5. Describe some applications from the book of the law of large numbers and the law of

(9) Solve exercise 14.14 (a, b, c) on page 390 from the course text book (5th edition). For the 4th edition users, the question is 13.14 (a,b,c)

The ability to send and receive data efficiently is the most important objective of networking computers.

Well-known communications protocols are Ethernet, a hardware and Link standard that is ubiquitous in local area networks, and the Internet Protocol Suite, which defines a set of protocols for internetworking, i.e. for data communication between multiple networks, as well as host-to-host data transfer, and application-specific data transmission formats.