Quiz Space

Computer Networks · Quiz 2 · 23 Nov 2025 · September 2025 term

Question 8: At the start of an RTT, the congestion window (CWND) is 1…

Question 8

+4 marksNumerical answer

At the start of an RTT, the congestion window (CWND) is 15 MSS where the Maximum Segment Size (MSS) is 1200 bytes. TCP is operating in the congestion avoidance phase, and there is one ACK per segment. What will be the new value of CWND (in bytes) after receiving 15 ACKs (i.e., one RTT worth of ACKs)?

Show answer

Correct answer: 19200

Question 8 of 14 in the IIT Madras BS Computer Networks (Computer Networks) Quiz 2 paper sat on 23 Nov 2025, in the September 2025 term (IIT M DEGREE AN EXAM QDB2 23 Nov 2025 NEW). It carries 4 marks.

More questions from this paper

  1. Q1During the fast recovery, a TCP connection has: CWND = 8 \text{ MSS} \text{Inflight} = 4 \text{ MSS} Each duplicate ACK…
  2. Q2A packet with destination IP 128.20.15.7 arrives at a router. The router's forwarding table has the following entries: …
  3. Q3A TCP receiver has a buffer size of 30 KB. The sender transmits data at 10 KB/s, while the receiver’s application reads…
  4. Q4A TCP connection has an advertised window size of 32 KB and a Round Trip Time (RTT) of 80 ms. Ignoring congestion effec…
  5. Q5An organization has been assigned an address block of 10.25.4.0/26. How many usable host addresses can be assigned to d…
  6. Q6An organization has 1,800 devices connected in a private network. Each NAT router can handle up to 80,000 simultaneous …
  7. Q7An administrator is given the private IP block 192.168.0.0/16. They need to create subnets that can each support at lea…
  8. Q9A TCP connection has a round-trip time (RTT) of 80 ms and a maximum segment size (MSS) of 1200 bytes. If the steady-sta…
  9. Q10Figure question
  10. Q11Figure question
  11. Q12Given IP address A = 172.25.50.22 and B = 172.25.63.10 with netmask 255.255.240.0, compute the network address of A (ie…
  12. Q13Given the following weighted graph of routers: | Link | Cost | |---|---| | U–V | 3 | | U–W | 6 | | U–X | 2 | | X–Y | 2 …
  13. Q14Figure question