Networking Models and Protocols Flashcards

Which protocol provides reliable, ordered delivery of data at the Transport layer?

Answer: TCP

TCP (Transmission Control Protocol) provides connection-oriented, reliable, ordered data delivery using acknowledgments and retransmission.

What is the well-known port number for DNS queries?

Answer: 53

DNS uses port 53 for both UDP (standard queries) and TCP (zone transfers and large responses).

In the OSI model, what term describes the unit of data at the Transport layer?

Answer: Segment

The Transport layer PDU is called a segment (TCP) or datagram (UDP), containing source/destination ports and data.

Which addressing scheme does IPv6 use?

Answer: 128-bit hexadecimal addresses

IPv6 uses 128-bit addresses expressed in hexadecimal, providing a vastly larger address space than IPv4's 32-bit addresses.

Which protocol is used by email clients to retrieve messages from a mail server and supports server-side folder management?

Answer: IMAP

IMAP (Internet Message Access Protocol) allows email clients to access and manage messages stored on the server, including folders and flags.

A company uses NAT on its router. What is the primary benefit of NAT?

Answer: It allows multiple private IP addresses to share a single public IP address

NAT (Network Address Translation) maps many private IP addresses to one or a few public IP addresses, conserving the IPv4 address space.

Which of the following correctly describes a 'protocol' in networking?

Answer: A set of rules governing communication between network devices

A network protocol is a standardized set of rules that defines how data is formatted, transmitted, received, and acknowledged between devices.