Identify the ONE CORRECT matching between the OSI layers and their corresponding functionalities as shown.
| OSI Layers | Functionalities | ||
|---|---|---|---|
| (a) | Network layer | (I) | Packet routing |
| (b) | Transport layer | (II) | Framing and error handling |
| (c) | Datalink layer | (III) | Host to host communication |
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)
