a) Why can we have the packet header in virtual circuit switching to be much smaller...
a) Why can we have the packet header in virtual circuit
switching to be much smaller than the typical header in datagram
switching?
b) Assume that we are using datagram switching (i.e. we are not
using virtual circuits). Is it possible to guarantee bandwidth to
each source-destination pair? Are there disadvantages of doing this
using datagram switching?
c) What is the big-O complexity of processing the header of a
packet if we are using virtual circuits? Briefly explain why.
d) Why in virtual circuits do we need a datagram routing table (in
addition to the virtual circuit table)
e) In the Internet, we have the option of doing source routing (IP
does have an option for this). What do you think could be the uses
for it? Can you come up with two of them?
Homework Answers
Add Answer to:
a) Why can we have the packet header in virtual circuit
switching to be much smaller...
a) Assume that we are using datagram switching (i.e. we are not using virtual circuits). Is...
a) Assume that we are using datagram switching (i.e. we are not using virtual circuits). Is it possible to guarantee bandwidth to each source-destination pair? Are there disadvantages of doing this using datagram switching? b) What is the big-O complexity of processing the header of a packet if we are using virtual circuits? Briefly explain why.
Compute the time required for circuit switching and packet switching with the following conditions: •The destination...
Compute the time required for circuit switching and packet switching with the following conditions: •The destination is 4hops away from the source: three intermediate switches between the source and the destination, with 4links. •The distance between source (anddestination) computerto its connected switch is 1Km.The distance between any two adjacent switches is 10Km. •The signal propagation speed is 5x10^5m per second.•The message size is 5 Mega bits (1 Mega = 10^6) •The maximum packet size is 200k bits (1k = 10^3....
Q1 Error detection/correction Can these schemes correct bit errors: Internet checksums, two-dimendional parity, cyclic...
Q1 Error detection/correction Can these schemes correct bit errors: Internet checksums, two-dimendional parity, cyclic redundancy check (CRC) A. Yes, No, No B. No, Yes, Yes c. No, Yes, No D. No, No, Yes E. Ho, hum, ha Q2 CRC vs Internet checksums Which of these is not true? A. CRC's are commonly used at the link layer B. CRC's can detect any bit error of up to r bits with an r-bit EDC. c. CRC's are more resilient to bursty...
help with computer network questions 1. What is the difference between circuit switching and packet switching?...
help with computer network questions 1. What is the difference between circuit switching and packet switching? 2. What are the different layers in today’s Internet? Why do we create layers? 3. Suppose there is a 10 Mbps microwave link between a geostationary satellite and its base station on Earth. Every minute the satellite takes a digital photo and sends it to the base station. Assume a propagation speed of 2.4 * 10^8 meters/sec. a. What is the propagation delay of...
- Network security QUESTION 17 We assume that a LAN network includes 7 hosts (A, B,...
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Network security
QUESTION 17 We assume that a LAN network includes 7 hosts (A, B, C, D, E. Fand G) which are connected by a switch. The contents of the switch's CAM table is as follows: (Port 1. Host A) - (Port 2. Host B) - (Port 3. Host - Port 4, Host D) - Port S. Hosta-Port 6, Host F) - (Port 7. HostG), Also, we assume that there is/are one or many host(s) that has/have sent fake...
Final Cxa am CSIT 340 Computer Networks, fall 2018 received at the receiver b) Assume that we send a packet transmission delay? What's the total deluy et with 100 Mega bytes from one nade to...
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1. To which of the following subnets does IP address 225.3.2.22 belong? 225.3.2.0/24 225.3.2.22/24 225.2.3.0/24 225.0.0.0/24...
1. To which of the following subnets does IP address 225.3.2.22 belong? 225.3.2.0/24 225.3.2.22/24 225.2.3.0/24 225.0.0.0/24 none of the above Question 2 On which of the following devices does the transport layer NOT run? laptop router cellphone A, B and C none of the above Question 3 What is the source address contained in the discover message sent by a host that is wanting to obtain an IP address? 255.255.255.255 0.0.0.0 the IP address of the server the last IP...
In this question, we will think about how to answer shortest path problems where we have more than just a single sourc...
In this question, we will think about how to answer shortest path problems where we have more than just a single source and destination. Answer each of the following in English (not code or pseudocode). Each subpart requires at most a few sentences to answer. Answers significantly longer than required will not receive full credit You are in charge of routing ambulances to emergency calls. You have k ambulances in your fleet that are parked at different locations, and you...
PART A 21 MARKS SHORT ANSWER QUESTIONS Answer ALL questions from this part. Write your answers...
PART A 21 MARKS
SHORT ANSWER QUESTIONS Answer ALL questions from this part. Write
your answers in the Examination Answer Booklet. Each question is
worth 1.5 marks (14 x 1.5 = 21 marks).
Question 1
An organisation has been granted a block of addresses with the mask
/22. If the organisation creates 8 equal-sized subnets, how many
addresses (including the special addresses) are available in each
subnet? Show your calculations.
Question 2
Give an example of a valid classful address...
In the last module you learned a formula for calculating bit rate, R = b/t, that...
In the last module you learned a formula for calculating bit rate, R = b/t, that is the number of bits divided by the time. This formula expresses the number of bits that are transmitted over a circuit in a given period of time. In practice, however, we are not only concerned with the number bits transmitted, but also with the number of data bits transmitted over a circuit. The data bits are those that the sender decides to send...
Q1 Error detection/correction Can these schemes correct bit errors: Internet checksums, two-dimendional parity, cyclic redundancy check (CRC) A. Yes, No, No B. No, Yes, Yes c. No, Yes, No D. No, No, Yes E. Ho, hum, ha Q2 CRC vs Internet checksums Which of these is not true? A. CRC's are commonly used at the link layer B. CRC's can detect any bit error of up to r bits with an r-bit EDC. c. CRC's are more resilient to bursty...
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Network security
QUESTION 17 We assume that a LAN network includes 7 hosts (A, B, C, D, E. Fand G) which are connected by a switch. The contents of the switch's CAM table is as follows: (Port 1. Host A) - (Port 2. Host B) - (Port 3. Host - Port 4, Host D) - Port S. Hosta-Port 6, Host F) - (Port 7. HostG), Also, we assume that there is/are one or many host(s) that has/have sent fake...
Final Cxa am CSIT 340 Computer Networks, fall 2018 received at the receiver b) Assume that we send a packet transmission delay? What's the total deluy et with 100 Mega bytes from one nade to the other. What's the isnoring queueing delay and nodal processing delay)? rors B. Wwhat's the meaning for (c) Calculate the Propagation value? e the Propugation Delay and Bandwidth product, Le, da te ale be forwarded to the link interfaces using the prefix entries tching" to...
In this question, we will think about how to answer shortest path problems where we have more than just a single source and destination. Answer each of the following in English (not code or pseudocode). Each subpart requires at most a few sentences to answer. Answers significantly longer than required will not receive full credit You are in charge of routing ambulances to emergency calls. You have k ambulances in your fleet that are parked at different locations, and you...
PART A 21 MARKS
SHORT ANSWER QUESTIONS Answer ALL questions from this part. Write
your answers in the Examination Answer Booklet. Each question is
worth 1.5 marks (14 x 1.5 = 21 marks).
Question 1
An organisation has been granted a block of addresses with the mask
/22. If the organisation creates 8 equal-sized subnets, how many
addresses (including the special addresses) are available in each
subnet? Show your calculations.
Question 2
Give an example of a valid classful address...
In the last module you learned a formula for calculating bit rate, R = b/t, that is the number of bits divided by the time. This formula expresses the number of bits that are transmitted over a circuit in a given period of time. In practice, however, we are not only concerned with the number bits transmitted, but also with the number of data bits transmitted over a circuit. The data bits are those that the sender decides to send...
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