Computer networksLesson 1 of 4 in the course Network layer and routing

IP Datagrams, Addressing, Protocol Evolution, and Delivery Limits

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

The Internet Protocol (IP) moves data across interconnected networks. This lesson introduces its role in the Internet protocol suite, explains how datagrams carry data, and compares the four principal IP addressing methods.

IP is a network-layer protocol in the Internet protocol suite. Its routing function enables packets to cross network boundaries, connecting separate networks into an internetwork. This capability is central to the operation of the Internet.

All flashcards

What is the Internet Protocol?
IP is a network-layer protocol that defines datagram formats and addressing, and routes datagrams between host interfaces across network boundaries.
What information is found in an IP header?
The header includes source and destination IP addresses plus metadata needed to handle and route the datagram.
What is encapsulation?
Encapsulation is the process of placing transported data inside a packet with a header that carries delivery and handling information.
How does multicast differ from broadcast?
Broadcast targets all nodes within its scope, generally a subnet. Multicast targets a selected group of interested nodes, which may be only a subset of the accessible nodes.
How does anycast choose a destination?
Anycast identifies a group of potential receivers with the same destination address, and routing selects one member, typically according to a distance or cost measure.

Quiz questions

  1. Which statement correctly distinguishes IP from TCP?Answer: IP provides connectionless datagram addressing and routing, while TCP provides a transport service.
  2. Which address sizes are used by IPv4 and IPv6, respectively?Answer: IPv4 uses 32-bit addresses; IPv6 uses 128-bit addresses.
  3. How do IPv4 and IPv6 differ in handling oversized datagrams at routers?Answer: IPv4 routers may fragment them; IPv6 routers do not fragment them in the network.
  4. Which statement about IP header checksums is correct?Answer: IPv4 includes a header checksum, whereas IPv6 has no IP header checksum.
  5. A datagram is intended for an interested subset of nodes rather than every node or one specific endpoint. Which addressing method fits?Answer: Multicast.

Based on the Wikipedia article Internet Protocol, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.

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