4.1.1 - IPv4 Datagram Header

Flashcards covering the key concepts and terminology related to the IPv4 header and various protocols in network communication.

IPv4

Internet Protocol version 4, a protocol for logical network addressing and forwarding.

Ethernet

A technology that works at the Physical and Data Link layers of the OSI model, implementing basic networking functions.

Internet Control Message Protocol (ICMP)

A protocol used for status messaging and connectivity testing.

Internet Group Messaging Protocol (IGMP)

A protocol used for multicasting.

Generic Routing Encapsulation (GRE)

A tunneling protocol used to encapsulate packets across an intermediate network.

Encapsulating Security Payload (ESP)

A protocol used with IPSec for encrypted IP packets.

Authentication Header (AH)

A protocol used with IPSec for authenticity and integrity of the IP packets.

Enhanced Interior Gateway Routing Protocol (EIGRP)

A routing protocol used to exchange routing information between routers.

Open Shortest Path First (OSPF)

A routing protocol used to determine the best path for data packets.

TTL (Time to Live)

A field in the IPv4 header that specifies the maximum number of hops a packet can take.

MTU (Maximum Transmission Unit)

The size of the largest packet that can be sent over a network.

Protocol field in an IP header

Indicates the type of data encapsulated in the payload, such as TCP or UDP.

IANA

Internet Assigned Numbers Authority, responsible for managing protocol type values.

Transmission Control Protocol (TCP)

A protocol that provides reliable communication through acknowledgments.

User Datagram Protocol (UDP)

A protocol that provides a connectionless communication method without acknowledgments.

What is the function of the Protocol field in the IPv4 header?

Specifies the type of data encapsulated in the payload