Question 1 |
In the following pairs of OSI protocol layer/sub-layer and its functionality, the
INCORRECT pair is
Network layer and Routing | |
Data Link Layer and Bit synchronization | |
Transport layer and End-to-end process communication | |
Medium Access Control sub-layer and Channel sharing |
Question 1 Explanation:
Question 2 |
An IP machine Q has a path to another IP machine H via three IP routers R1, R2, and R3.
Q---R1---R2---R3---H
H acts as an HTTP server, and Q connects to H via HTTP and downloads a file. Session layer encryption is used, with DES as the shared key encryption protocol. Consider the following four pieces of information:
[I1] The URL of the file downloaded by Q
[I2] The TCP port numbers at Q and H
[I3] The IP addresses of Q and H
[I4] The link layer addresses of Q and H
Which of I1, I2, I3, and I4 can an intruder learn through sniffing at R2 alone?
Q---R1---R2---R3---H
H acts as an HTTP server, and Q connects to H via HTTP and downloads a file. Session layer encryption is used, with DES as the shared key encryption protocol. Consider the following four pieces of information:
[I1] The URL of the file downloaded by Q
[I2] The TCP port numbers at Q and H
[I3] The IP addresses of Q and H
[I4] The link layer addresses of Q and H
Which of I1, I2, I3, and I4 can an intruder learn through sniffing at R2 alone?
Only I1 and I2 | |
Only I1 | |
Only I2 and I3 | |
Only I3 and I4 |
Question 2 Explanation:
Question 3 |
Match the following:
(P) SMTP (1) Application layer
(Q) BGP (2) Transport layer
(R) TCP (3) Data link layer
(S) PPP (4) Network layer
(5) Physical layer
P - 2 Q - 1 R - 3 S - 5 | |
P - 1 Q - 4 R - 2 S - 3 | |
P - 1 Q - 4 R - 2 S - 5 | |
P - 2 Q - 4 R - 1 S - 3 |
Question 3 Explanation:
Question 4 |
Choose the best matching between Group 1 and Group 2
\begin{array}{|l|l|}\hline \textbf{Group-1} & \textbf{Group-2} \\\hline \text{P. Data link layer} & \text{1. Ensures reliable transport of data over a physical point-}\\ & \text{to-point link} \\\hline \text{Q. Network layer} & \text{2. Encodes/decodes data for physical transmission} \\\hline \text{R. Transport layer} & \text{3. Allows end-to-end communication between two }\\ & \text{processes} \\\hline \text{} & \text{4. Routes data from one network node to the next} \\\hline \end{array}
\begin{array}{|l|l|}\hline \textbf{Group-1} & \textbf{Group-2} \\\hline \text{P. Data link layer} & \text{1. Ensures reliable transport of data over a physical point-}\\ & \text{to-point link} \\\hline \text{Q. Network layer} & \text{2. Encodes/decodes data for physical transmission} \\\hline \text{R. Transport layer} & \text{3. Allows end-to-end communication between two }\\ & \text{processes} \\\hline \text{} & \text{4. Routes data from one network node to the next} \\\hline \end{array}
P - 1, Q - 4, R - 3 | |
P- 2, Q - 4, R - 1 | |
P - 2, Q - 3, R - 1 | |
P-1, Q - 3, R - 2 |
Question 4 Explanation:
There are 4 questions to complete.
In Question no. 4 Group 2 point no. 4 Missing pease update
Thank you dp kushwaha,
We have updated the question.