Computer Networks Lecture 4: Application Models and Security

Which layer will be discussed in the lecture?

Which of the following is an example of a program run on the application layer?

What is the protocol used for file transfer at the application layer?

Which of the following is not an example of an application layer program?

What are the two application models mentioned in the text?

What type of protocol is HTTP at the application layer?

What is a characteristic of the client in a Client-Server network model?

What does the server do in the Client-Server network model?

In Peer-to-Peer (P2P) network model, what does each node function as?

What is a characteristic of Peer-to-Peer (P2P) network model in comparison to Client-Server model?

How do processes within the same host communicate in the Peer-to-Peer (P2P) model?

What differentiates the clients and servers in the Client-Server network model?

What is a characteristic of clients in the Peer-to-Peer (P2P) model?

What is a characteristic of Peer-to-Peer (P2P) networks in comparison to Client-Server networks?

What characterizes the communication of two processes within the same host in the Peer-to-Peer (P2P) model?

What do applications with P2P architectures have in the Peer-to-Peer model?

What is the responsibility of the data link layer in a computer network?

Which hardware is an example of the implementation of the data link layer?

What does the data-link layer do with the packets from the network layer?

What is the main function of the framing process in the data link layer?

In a computer network, what role does the data link layer play at each network node?

What represents an example of datagram transferred by different link protocols over different links?

What is the responsibility of the Logical Link Control (LLC) sublayer of the data link layer?

Which type of error means that two or more bits in the data unit have changed from 0 to 1 or vice-versa?

What is the primary purpose of using a redundant bit in the simple parity check mechanism for error detection?

What does the Media Access Control (MAC) sublayer of the data link layer primarily handle?

What is a characteristic of burst errors in data units?

What differentiates the Two-dimensions Parity Check from the simple parity check mechanism?

Which mechanism is considered the most common and least expensive for error detection in data units?

What is primarily responsible for controlling physical media access in the data link layer?

What is the primary purpose of using Cyclic Redundancy Check (CRC) as an error detection mechanism?

What is a potential benefit of using Two-dimensions Parity Check over simple parity check for error detection?