Consider a file of size 4 million bytes being transferred between two hosts connected via a path consisting of three consecutive links of bandwidth $2 \mathrm{Mbps}, 500 \mathrm{kbps}$, and 1 Mbps , respectively. All processing delays and propagation delays are negligible. Assume that there is no other background traffic over the path and no other additional overhead to transfer the file.
Which one of the following is the total time (in seconds) to transfer the file?
Note: $1 \mathrm{M}=10^6, 1 \mathrm{k}=10^3$
Consider the following statements :
(i) Address Resolution Protocol (ARP) provides a mapping from an IP address to the corresponding hardware (link-layer) address.
(ii) A single TCP segment from a sender $S$ to a receiver $R$ cannot carry both data from $S$ to $R$ and acknowledgement for a segment from $R$ to $S$.
Which ONE of the following is CORRECT?
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 |
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