Consider the 3-way handshaking protocol for TCP connection establishment. Let the three packets exchanged during the connection establishment be denoted as P1, P2 and P3, in order. Which of the following option(s) is/are TRUE with respect to TCP header flags that are set in the packets?
A packet with the destination IP address 145.36.109.70 arrives at a router whose routing table is shown. Which interface will the packet be forwarded to?
| Subnet Address | Subnet Mask (in CIDR notation) |
Interface |
|---|---|---|
| 145.36.0.0 | /16 | E1 |
| 145.36.128.0 | /17 | E2 |
| 145.36.64.0 | /18 | E3 |
| 145.36.255.0 | /24 | E4 |
| Default | $-$ | E5 |
Suppose a message of size 15000 bytes is transmitted from a source to a destination using IPv4 protocol via two routers as shown in the figure. Each router has a defined maximum transmission unit (MTU) as shown in the figure, including IP header. The number of fragments that will be delivered to the destination is _________ . (Answer in integer)
Suppose a program is running on a non-pipelined single processor computer system. The computer is connected to an external device that can interrupt the processor asynchronously. The processor needs to execute the interrupt service routine (ISR) to serve this interrupt. The following steps (not necessarily in order) are taken by the processor when the interrupt arrives:
(i) The processor saves the content of the program counter.
(ii) The program counter is loaded with the start address of the ISR.
(iii) The processor finishes the present instruction.
Which ONE of the following is the CORRECT sequence of steps?