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University of Kerbala College of Computer Science and Information Technology Information Technology Department جامعة كبرياء Exam 1 Subject: Computer Networks I Exam Duration : 1hour Date: 21/11/2021 Q1: Fill in below blanks with appropriate word(s) (10 Marks) A) Network-core has two key functions which are. Routing and forwarding B) physical and Link layers can usually only be found at the network edge. transport day en prateneck link on end-end path that constrains end-end throughput. should be encapsulated in frames before being transmitted. E) bandwidth, throughputand latency or network performance. delay are the measures to check F) store and for means entire packet must arrive at router before it can be transmitted on next link. Q2: Answer below questions (15 Marks) Cable to HFC DSL Dialup 100Mbps switched ethernet A) List 4 access technologies. Classify each one as home access, enterprise 3 Gand IG access, or wide-area wireless access. الوظيفة الأساسية B) List the layers of the Internet protocol stack. Describe the main function for each layer, and name the data at the layer and mention 2 protocols. C) List the types of delay in networks and describe each one of them. Q3: Solve below problems (10 Marks) bits a- Two computers are communicating over a 10 km fiber optic link by using 500-byte frames at a transmission rate of 100 Mbps. The propagation speed as 200000 km/sec. 2x10 m/sec. Calculate total delay ignoring any processing and queuing delay. b- Consider the scenario in the figure, in which 3 hosts and a local server are connected to a router and to each other by a 100 Mbps link, with 0 propagation delay. That router in turn is connected to another router over a 30 Mbps link with a 50 ms propagation delay, and that latter router is connected to two remote servers, each over a 20 Mbps link with a 10 ms propagation delay. Suppose a host sends a message directly to one of the remote servers. The message is 10K bits long. What is the end-to-end delay? Assume that there are no queuing or processing delays? 20 Mbps 10 ms prop. delay 30 Mbps 50 ms prop. delay 100Mbps 0 ms prop. delay The solution is not certain I want to understand the questions with how to think and conclude a solution

University of Kerbala College of Computer Science and Information Technology Information Technology Department جامعة كبرياء Exam 1 Subject: Computer Networks I Exam Duration : 1hour Date: 21/11/2021 Q1: Fill in below blanks with appropriate word(s) (10 Marks) A) Network-core has two key functions which are. Routing and forwarding B) physical and Link layers can usually only be found at the network edge. transport day en prateneck link on end-end path that constrains end-end throughput. should be encapsulated in frames before being transmitted. E) bandwidth, throughputand latency or network performance. delay are the measures to check F) store and for means entire packet must arrive at router before it can be transmitted on next link. Q2: Answer below questions (15 Marks) Cable to HFC DSL Dialup 100Mbps switched ethernet A) List 4 access technologies. Classify each one as home access, enterprise 3 Gand IG access, or wide-area wireless access. الوظيفة الأساسية B) List the layers of the Internet protocol stack. Describe the main function for each layer, and name the data at the layer and mention 2 protocols. C) List the types of delay in networks and describe each one of them. Q3: Solve below problems (10 Marks) bits a- Two computers are communicating over a 10 km fiber optic link by using 500-byte frames at a transmission rate of 100 Mbps. The propagation speed as 200000 km/sec. 2x10 m/sec. Calculate total delay ignoring any processing and queuing delay. b- Consider the scenario in the figure, in which 3 hosts and a local server are connected to a router and to each other by a 100 Mbps link, with 0 propagation delay. That router in turn is connected to another router over a 30 Mbps link with a 50 ms propagation delay, and that latter router is connected to two remote servers, each over a 20 Mbps link with a 10 ms propagation delay. Suppose a host sends a message directly to one of the remote servers. The message is 10K bits long. What is the end-to-end delay? Assume that there are no queuing or processing delays? 20 Mbps 10 ms prop. delay 30 Mbps 50 ms prop. delay 100Mbps 0 ms prop. delay The solution is not certain I want to understand the questions with how to think and conclude a solution

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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University of Kerbala College of Computer Science and Information Technology Information Technology Department جامعة كبرياء Exam 1 Subject: Computer Networks I Exam Duration : 1hour Date: 21/11/2021 Q1: Fill in below blanks with appropriate word(s) (10 Marks) A) Network-core has two key functions which are. Routing and forwarding B) physical and Link layers can usually only be found at the network edge. transport day en prateneck link on end-end path that constrains end-end throughput. should be encapsulated in frames before being transmitted. E) bandwidth, throughputand latency or network performance. delay are the measures to check F) store and for means entire packet must arrive at router before it can be transmitted on next link. Q2: Answer below questions (15 Marks) Cable to HFC DSL Dialup 100Mbps switched ethernet A) List 4 access technologies. Classify each one as home access, enterprise 3 Gand IG access, or wide-area wireless access. الوظيفة الأساسية B) List the layers of the Internet protocol stack. Describe the main function for each layer, and name the data at the layer and mention 2 protocols. C) List the types of delay in networks and describe each one of them. Q3: Solve below problems (10 Marks) bits a- Two computers are communicating over a 10 km fiber optic link by using 500-byte frames at a transmission rate of 100 Mbps. The propagation speed as 200000 km/sec. 2x10 m/sec. Calculate total delay ignoring any processing and queuing delay. b- Consider the scenario in the figure, in which 3 hosts and a local server are connected to a router and to each other by a 100 Mbps link, with 0 propagation delay. That router in turn is connected to another router over a 30 Mbps link with a 50 ms propagation delay, and that latter router is connected to two remote servers, each over a 20 Mbps link with a 10 ms propagation delay. Suppose a host sends a message directly to one of the remote servers. The message is 10K bits long. What is the end-to-end delay? Assume that there are no queuing or processing delays? 20 Mbps 10 ms prop. delay 30 Mbps 50 ms prop. delay 100Mbps 0 ms prop. delay The solution is not certain I want to understand the questions with how to think and conclude a solution
Transcribed Image Text:University of Kerbala College of Computer Science and Information Technology Information Technology Department جامعة كبرياء Exam 1 Subject: Computer Networks I Exam Duration : 1hour Date: 21/11/2021 Q1: Fill in below blanks with appropriate word(s) (10 Marks) A) Network-core has two key functions which are. Routing and forwarding B) physical and Link layers can usually only be found at the network edge. transport day en prateneck link on end-end path that constrains end-end throughput. should be encapsulated in frames before being transmitted. E) bandwidth, throughputand latency or network performance. delay are the measures to check F) store and for means entire packet must arrive at router before it can be transmitted on next link. Q2: Answer below questions (15 Marks) Cable to HFC DSL Dialup 100Mbps switched ethernet A) List 4 access technologies. Classify each one as home access, enterprise 3 Gand IG access, or wide-area wireless access. الوظيفة الأساسية B) List the layers of the Internet protocol stack. Describe the main function for each layer, and name the data at the layer and mention 2 protocols. C) List the types of delay in networks and describe each one of them. Q3: Solve below problems (10 Marks) bits a- Two computers are communicating over a 10 km fiber optic link by using 500-byte frames at a transmission rate of 100 Mbps. The propagation speed as 200000 km/sec. 2x10 m/sec. Calculate total delay ignoring any processing and queuing delay. b- Consider the scenario in the figure, in which 3 hosts and a local server are connected to a router and to each other by a 100 Mbps link, with 0 propagation delay. That router in turn is connected to another router over a 30 Mbps link with a 50 ms propagation delay, and that latter router is connected to two remote servers, each over a 20 Mbps link with a 10 ms propagation delay. Suppose a host sends a message directly to one of the remote servers. The message is 10K bits long. What is the end-to-end delay? Assume that there are no queuing or processing delays? 20 Mbps 10 ms prop. delay 30 Mbps 50 ms prop. delay 100Mbps 0 ms prop. delay The solution is not certain I want to understand the questions with how to think and conclude a solution
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