Search results
Results from the WOW.Com Content Network
Protocol Number Keyword Protocol References/RFC; 0x00 0 HOPOPT IPv6 Hop-by-Hop Option: RFC 8200: 0x01 1 ICMP Internet Control Message Protocol: RFC 792: 0x02 2 IGMP Internet Group Management Protocol: RFC 1112: 0x03 3 GGP Gateway-to-Gateway Protocol: RFC 823: 0x04 4 IP-in-IP IP in IP (encapsulation) RFC 2003: 0x05 5 ST Internet Stream Protocol ...
The ICMP header starts after the IPv4 header and is identified by its protocol number, 1. [6] All ICMP packets have an eight-byte header and variable-sized data section. The first four bytes of the header have fixed format, while the last four bytes depend on the type and code of the ICMP packet.
ICMPv6 provides a minimal level of message integrity verification by the inclusion of a 16-bit checksum in its header. The checksum is calculated starting with a pseudo-header of IPv6 header fields according to the IPv6 standard, [6] which consists of the source and destination addresses, the packet length and the next header field, the latter of which is set to the value 58.
Pinging involves sending an ICMP echo request to the target host and waiting for an ICMP echo reply. The program reports errors, packet loss , and a statistical summary of the results, typically including the minimum, maximum, the mean round-trip times, and standard deviation of the mean.
Defending Against Sequence Number Attacks: May 1996: IP spoofing: RFC 1950 : ZLIB Compressed Data Format Specification version 3.3: May 1996: Zlib v 3.3: RFC 1951 : DEFLATE Compressed Data Format Specification version 1.3: May 1996: DEFLATE v 1.3: RFC 1952 : GZIP file format specification version 4.3: May 1996: Gzip v 4.3: RFC 1964 : The ...
When requesting a file transfer, the host making the request identifies the corresponding data connection by its network layer and transport layer addresses. If the host making the request lies behind a simple NAT firewall, the translation of the IP address or TCP port number makes the information received by the server invalid.
This field is the Internet Protocol version number. Set to 4 to indicate IPv4. Internet Header Length (IHL): 4 bits This field is the length of outer IP header. Differentiated Services Code Point (DSCP): 6 bits This field is copied from the inner IP header. Explicit Congestion Notification (ECN): 2 bits This field is copied from the inner IP ...
The server listens on UDP port number 67, and the client listens on UDP port number 68. DHCP operations fall into four phases: server discovery, IP lease offer, IP lease request, and IP lease acknowledgement. These stages are often abbreviated as DORA for discovery, offer, request, and acknowledgement.