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1. Which mail access protocol is used for sending emails across the internet?
Choose the correct option:

  • a) POP3

  • b) SMTP

  • c) IMAP

  • d) MAPI

SMTP is the standard protocol for sending emails across the internet whereas POP3 and IMAP are standard protocols for retrieving emails. MAPI is an interface that helps programs become email aware.

2. POP3 is used to access emails from multiple clients/computers.
Choose the correct option:

  • a) True

  • b) False

POP3 is used to access email from only one client. IMAP is used to simultaneously access email from multiple clients.

6. POP3 protocol belongs to which layer of the ISO OSI model?
Choose the correct option:

  • a) Data Link layer

  • b) Network layer

  • c) Application layer

  • d) Transport layer

POP3 protocol is an application layer protocol used by email clients to retrieve emails. Protocols like MAC, IP, and TCP, work on the Data Link layer, Network layer, and Transport layer respectively.

1. The main reason for transition from IPv4 to IPv6 is _________
Choose the correct option:

  • a) Huge number of systems on the internet

  • b) Very low number of system on the internet

  • c) Providing standard address

  • d) To provide faster internet

Due to huge number of systems on the internet and the lower number of available addresses on IPv4, transition from IPv4 to IPv6 needs to happen. IPv4 provides around 4 billion unique IP addresses whereas IPv6 provides over 340 undecillion unique IP addresses.

7. Which of the following can be used by a router to increase the processing speed of the packet?
Choose the correct option:

  • a) Routing table

  • b) Flow label table

  • c) Routing algorithm

  • d) Routing table and algorithm

A router can contain a flow label table if it is capable of supporting flow labels. Flow label helps the router to find the next hop without consulting the routing table. If the router does not supports the flow label then it simply leaves it aside.

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