Tutorial02-TSN2201-2310
.docx
School
Multimedia University, Cyberjaya**We aren't endorsed by this school
Course
TSN 2201
Subject
Computer Science
Date
Jan 14, 2025
Pages
3
Uploaded by CorporalExplorationManatee27
TSN2201 COMPUTER NETWORKSTUTORIAL 2 (Tri 1, 2023/2024)Part A: Structured1.What are the types of address used in each of the following layer?Application, Network, Data-link layer.2.Which of the following data units has an application-layer message plus the header from layer 4? A frame? User datagram? A bit?-User datagram3.What is the role played by network layer during data transmission?-User datagram4.List THREE responsibilities of the data link layer.-Firming: The data link layer encapsulates network layer packets into frames. It adds a header and trailer to each packet, creating a frame that includes necessary information for the reliable delivery of data, such as source and destination addresses, error-checking information, and control information.-Media Access Control (MAC): The data link layer manages access to the physical network medium. It determines how devices on the network can access the transmission medium, addressing issues such as contention and collision avoidance in shared network environments. The MAC sublayer is responsible for uniquely identifying devices on a network using physical addresses (MAC addresses) and ensuring that multiple devices can share the communication medium efficiently.-Error Detection and Correction: The data link layer includes mechanisms for detecting and, in some cases, correcting errors that may occur during data transmission over the physical layer. By appending error-checking bits to the frame, the data link layer can identify whether errors have occurred and take appropriate actions, such as requesting retransmission of corrupted frames.5.Match the following to one of the Internet layers a. Reliable process-to-process data transportation : Transport Layerb. Network selection : Network Layerc. Routing : Network Layerd. Provides user services such as email and file transfer: Application Layer e. Transmission of bit stream across physical medium. : Physical Layerf. Ensuring reliable transmission of data. : Transport LayerPart B: MCQ1. The process-to-process delivery of the entire message is the responsibility of the _____transport______layer. a. network c. data link b. transport d. physical 2. The ________physical____________ layer is closest to the transmission medium. a. network c. data link
b. transport d. physical 3. Mail services are available to users through the ______application_________ layer. a. application c. data link b. session d. physical 4. When independent networks or links are connected to create an internetwork, the connecting devices: a. always reformat the encapsulated message. b. route or switch the packets to their final destination. c. immediately forward all incoming messages along to the destination address without reading the destination address. d. None of the above. b. route or switch the packets to their final destination5. The information contained in the data link layer allow for: a. framing or dividing the stream of bits into data units called frames. b. Flow control ensuring that the data rate timing between sender and receiver is maintained. c. physical addressing providing node to node information. d. All of the above. d. All of the above6. The physical layer defines the: a. characteristics of the interface between the devices and the transmission media. b. acceptance of encoded electrical or optical signals. c. type of transmission medium. d. All of the above. d. All of the above7. The _______________ layer changes streams of bits into electromagnetic signals. a. data link c. session b. physical d. network b. physical8. When data are transmitted from computing device A to computing device B, the header from A's layer 3 is read by B's ____________ layer. a. session c. network b. transportd. application c. network9. On the incoming side of the internetwork, as the data packet moves from the lower to the upper layers, headers are _______________. a. added c. rearranged b. subtracted d. modifiedb. subtract