Definitions

1. A Header Checksum is a number used to check for errors in header information, and is calculated using the numbers in the header. (Web site)
2. If a header checksum is found to be mismatched, then the packet is discarded.
3. The IP header checksum is just the checksum of the IP header itself, but please note that the checksum is calculate with certain fields set to 0. (Web site)
4. The IP header checksum is then fixed to reflect this modification. (Web site)
5. If IP header checksum is equal to zero, control passes to step 1330. (Web site)

Data Checksum Option

1. The DCCP header checksum will cover the Data Checksum option, so the data checksum must be computed before the header checksum.

Modified

1. ICMP header in ICMP Query packets must also be modified to replace the query ID and ICMP header checksum. (Web site)

Datagram

1. A host MUST verify the IP header checksum on every received datagram and silently discard every datagram that has a bad checksum. (Web site)

Application Data

1. Thus, if CsCov is 1, none of the application data is protected by the header checksum.

Value

1. Header Checksum -- This will change if any of these other fields changes, and thus its value upon reception cannot be predicted by the sender. (Web site)
2. The receiving device performs the same calculation and compares the result with the value in the header checksum field. (Web site)

Zeros

1. The "TIME TO LIVE" and "HEADER CHECKSUM" fields of the IPv4 base header MUST be set to all zeros for the Authentication Data calculation.

Error Checking

1. Header Checksum - The checksum field is used for error checking the packet header. (Web site)

Error Control

1. There is no error control for data, only a header checksum.

Internet Datagram

1. If the header checksum fails, the internet datagram is discarded at once by the entity which detects the error.

Bit Errors

1. Thus for IPv6 the ECN field can be accidentally modified by bit errors on links or in routers without being detected by an IP header checksum. (Web site)

Header

1. The IPv4 header contains a header checksum of the contents of the header (excluding the checksum field).
2. We note that in IPv4, the IP header is protected from bit errors by a header checksum; this is not the case in IPv6. (Web site)

Checksum

1. Header Checksum: 16 bits A checksum on the header only. (Web site)
2. Checksum The internet header checksum is recomputed if the internet header is changed. (Web site)

Header Checksum

1. Header Checksum (16 bits): This is a checksum on the header only, which ensures integrity of header values. (Web site)
2. That header part of IP packet is protected by header checksum included in the header. (Web site)

Categories

1. Checksum
2. Header
3. Bit Errors
4. Internet Datagram
5. Error Control
6. Books about "Header Checksum" in Amazon.com
   

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