Ip header
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This document summarizes the key fields in an IP version 4 packet header: 1) It contains fields for the version number, header length, type of service, total length, identification, flags, fragment offset, time to live, protocol, header checksum, source address, and destination address. 2) The version field indicates the IP protocol version (4 or 6). The header length field specifies the length of the IP header in 32-bit words. The total length field specifies the length of the entire IP packet or fragment. 3) The flags field contains bits for "Do not fragment", "More fragments", and reserved fields. This provides information about fragmentation of large packets.
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how to change ttl value for windows
14 IP Header.pptx
The document discusses IP datagram fragmentation and reassembly. It describes how a large IP datagram can be split into smaller fragments in order to be transmitted across networks with different maximum transmission unit (MTU) sizes. Each fragment contains an IP header with fields like identification and fragment offset that allow the receiving host to properly reassemble the original datagram from the fragments. An example is provided of an original 4000 byte datagram being split into multiple 1500 byte fragments to traverse a network with MTU of 1500.
Network Layer
The document summarizes key aspects of the Internet Protocol version 4 (IPv4) including:
- IPv4 provides unreliable, connectionless delivery of packets called internet datagrams between hosts on diverse networks.
- The IPv4 header contains fields for version, header length, type of service, total length, identification, flags, fragment offset, time-to-live, protocol, header checksum, source address, and destination address.
- IPv4 addresses are hierarchical, consisting of a network portion and local host portion, and are divided into classes A, B, and C based on network size.
Ipv4
Internet Protocol (IP) is used to carry data from source to destination hosts across the Internet by providing addressing, fragmentation and reassembly, packet timeouts, and prioritization of traffic. IP uses 32-bit addresses to identify sending and receiving hosts and allows packets to be split into smaller fragments if needed to travel across networks. Routers use the IP Time to Live field to discard packets that have been traveling too long to prevent flooding of networks.
I pv6
The document summarizes key aspects of IPv6 including:
1. IPv6 uses 128-bit addresses compared to 32-bit addresses in IPv4 and eliminates leading zeros in blocks of numbers and replaces consecutive zeros with "::".
2. IPv6 addresses come in different formats like global unicast using an interface ID, link-local unicast using an interface ID, and multicast using a scope and group ID.
3. The IPv6 header is similar to IPv4 but uses a 64-bit flow label field and has extension headers for additional functions like routing, fragmentation, and encryption.
I pv6
The document summarizes key aspects of IPv6 including:
1. IPv6 uses 128-bit addresses compared to 32-bit addresses in IPv4 and eliminates leading zeros in blocks of numbers and replaces consecutive zeros with "::".
2. IPv6 addresses come in different formats like global unicast using an interface ID, link-local unicast using an interface ID, and multicast using a scope and group ID.
3. The IPv6 header is similar to IPv4 but uses a 64-bit flow label field and has extension headers for additional functions like routing, fragmentation, and security.
I pv6
The document summarizes key aspects of IPv6 including:
1. IPv6 uses 128-bit addresses compared to 32-bit addresses in IPv4 and eliminates leading zeros in blocks of numbers and replaces consecutive zeros with "::".
2. IPv6 addresses come in different formats like global unicast using an interface ID, link-local unicast using an interface ID, and multicast using a scope and group ID.
3. The IPv6 header is similar to IPv4 but uses a 64-bit flow label field and has extension headers for additional functions like routing, fragmentation, and security.
10 coms 525 tcpip - internet protocol - ip
IP is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries. It is a connectionless, best-effort protocol that does not guarantee delivery. IP packets can be fragmented into smaller units if their size exceeds the maximum transmission unit of the network. Fragmentation involves splitting the packet into multiple fragments that contain the same identification field but varying fragment offset and total length fields. The fragments are reassembled into the original packet at the destination.
Internetworking - IP
- The Internet Protocol (IP) is the key networking protocol that enables internetworking and provides host-to-host delivery of data packets across interconnected networks of varying technologies.
- IP uses a best-effort delivery model, meaning it does not guarantee delivery of data packets and does not remedy lost, corrupted, misdelivered, or undelivered packets.
- IP packet headers contain fields for source and destination addresses, protocol type, fragmentation information, and more. IP packets can be fragmented into smaller pieces to accommodate networks with smaller maximum transmission unit sizes.
I.p. protocol
Communication at the network layer is host-to-host (computer-to-computer). A computer somewhere in the world needs to communicate with another computer somewhere else in the world. For this communication, we need a global addressing scheme, called “logical addressing” Today, IP addresses are used to provide logical addresses in the network layer of the TCP/IP protocol suite.
IPV4 - The Internet addresses are 32 bits in length; this gives us a maximum of 2^32 addresses. These addresses are referred to as IPv4 (IP version 4) addresses or simply IP addresses. The need for more addresses, in addition to other concerns about the IP layer, motivated a new design of the IP layer called the new generation of IP or IPv6 (IP version 6).
In this version, the Internet addresses are 128 bits in length; this gives us a maximum of 2^128 addresses. 128-bit addresses give much greater flexibility in address allocation. These addresses are referred to as IPv6 (IP version 6) addresses.
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This document provides an overview of MX Trio load balancing. It discusses how packets are parsed and hashed to select the next hop in a load balancing system. Key points include:
- Packets are parsed to select fields for hashing. A hash is computed from the fields to select the next hop.
- Fields included in the hash depend on packet encapsulation like IP, MPLS, Ethernet. Advanced topics cover techniques for determining encapsulation.
- Hashes are symmetric and consistent across devices to prevent polarization. Load balancing occurs at multiple levels by using different hash bits at each level.
- The hash algorithm uses CRC polynomials for efficiency. A hash seed based on device MAC ensures different results across
nat.ppt
The document discusses IPv6 addressing and packet formats. It begins by noting that IPv6 addresses are 128 bits long and represented in hexadecimal colon notation. It then details the standard IPv6 packet header format, which includes fields for version, traffic class, flow label, payload length, next header, hop limit, source address, and destination address. The header is fixed at 40 bytes. The document also provides a comparison of IPv4 and IPv6 addressing concepts and header structures.
Understanding Internet Protocol (IPv4)
This document provides instructions for a lab assignment on understanding the Internet Protocol version 4 (IPv4) using the network analysis tool Wireshark. Students are asked to capture HTTP traffic from their own computer, examine the packet headers, and answer 6 questions focusing on IPv4 header fields and packet fragmentation. The questions cover identifying interface and browser used, completing IPv4 header fields for a packet, describing each field's purpose, minimum and maximum IPv4 header sizes, and explaining the concept of IP fragmentation.
Ipspk1
IP is the network layer protocol that provides an unreliable, connectionless, best-effort delivery service for transmitting data packets across networks. It operates by fragmenting large data packets into smaller fragments if needed to meet the maximum transmission unit size of the underlying data link layer. Key fields in the IP header include the identification field to identify fragments of the same packet, the fragment offset field to indicate the position of data in the original packet, and flags to indicate if a packet is a fragment or the last fragment.
Intro tcpip-part1
TCP/IP is a suite of protocols that allow devices on a network to communicate. It includes two main protocols: Transmission Control Protocol (TCP) and Internet Protocol (IP). TCP establishes connections between devices and ensures reliable delivery of data packets. IP provides addressing so packets can be routed between networks to their destination. Together, TCP and IP handle reliable data transmission and packet delivery across interconnected networks like the Internet.
Similar to Ip header (20)
TCP/IP – Transmission Control Protocol/ Internet Protocol
TCP/IP – Transmission Control Protocol/ Internet Protocol
Ip header
- 1. IP Header (version 4) Byte Offset 0 1 2 3 0 IHL (Header Version Type of Service (TOS) Total Length Length) 4 IP Flags Identification Fragment Offset x D M 20 8 Bytes Time To Live (TTL) Protocol Header Checksum IHL 12 Source Address (Internet Header Length) 16 Destination Address 20 IP Option (optional, not common) 1 2 3 Bit 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 Nibble Byte Word Version Protocol Fragment Offset IP Flags Version of IP Protocol. 4 and IP Protocol ID. Including (but Fragment offset from start of x D M 6 are valid. This diagram not limited to): IP datagram. Measured in 8 represents version 4 1 ICMP 17 UDP 57 SKIP byte (2 words, 64 bits) x 0x80 reserved (evil bit) structure only. 2 IGMP 47 GRE 88 EIGRP increments. If IP datagram is D 0x40 Do Not Fragment 6 TCP 50 ESP 89 OSPF fragmented, fragment size M 0x20 More Fragments 9 IGRP 51 AH 115 L2TP Header Length (Total Length) must be a follow multiple of 8 bytes. RFC 791 Number of 32-bit words in Total Length TCP header, minimum value Header Checksum Please refer to RFC 791 for of 5. Multiply by 4 to get byte Total length of IP datagram, the complete Internet or IP fragment if fragmented. Checksum of entire IP count. Protocol (IP) Specification. Measured in Bytes. header Copyright 2004 - Matt Baxter - mjb@fatpipe.org