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Is a process-to-process protocol that adds only port addresses checksum error control and length information to the data from the upper layer?
Yes, the description refers to the User Datagram Protocol (UDP). UDP is a process-to-process protocol that adds port addresses, checksum error control, and length information to the data it receives from the upper layer. Unlike TCP, UDP is connectionless and does not guarantee delivery or order, making it suitable for applications where speed is essential, and occasional data loss is acceptable.
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What does it mean when a protocol gets a checksum?
A checksum is used to determine that the information sent using the protocol has not been corrupted en-route.
What are the 4 parts of a packet?
A packet typically consists of four main parts: the header, payload, trailer, and sometimes a checksum. The header contains information such as source and destination addresses, as well as protocol details. The payload is the actual data being transmitted. The trailer often contains error-checking information, while the checksum helps ensure data integrity by verifying that the packet has not been corrupted during transmission.
How do you calculate the checksum of ICMP packet?
To calculate the checksum of an ICMP packet, you first need to create a pseudo-header that includes the source and destination IP addresses, the protocol number (1 for ICMP), and the length of the ICMP packet. Then, concatenate this pseudo-header with the ICMP packet data. The checksum is computed by performing a bitwise one's complement sum of all 16-bit words in the combined data, followed by taking the one's complement of the final sum. Finally, the calculated checksum is inserted into the ICMP packet's checksum field.
How is the checksum evaluated in UDP?
In UDP, the checksum is evaluated by taking the 16-bit one's complement sum of the UDP header, the UDP data (payload), and a pseudo-header that includes the source and destination IP addresses, protocol number, and UDP length. If the sum exceeds 16 bits, the overflow is wrapped around and added back into the least significant bits. The final checksum is then the one's complement of this sum. When a receiver checks the checksum, it performs the same sum; if the result is zero, the packet is considered valid.
Which protocol is used to convert logical IP addresses to physical MAC addresses?
Address Resolution Protocol (ARP)ARP is primarily used to translate IP Addresses to Ethernet MAC Addresses.
What protocol maps layer 2 to layer 3 addresses on the TCP IP network?
RARP (Reverse Address Resolution Protocol) maps layer 2 addresses to layer 3 addresses. ARP (Address Resolution Protocol) maps layer 3 addresses to layer 2 addresses.
Which protocol maps known IP addresses to MAC addresses on a local network?
ARP
What protocol map ip addresses to layer 2 addresses?
ARP - Address Resolution ProtocolARP - Address Resolution ProtocolARP - Address Resolution ProtocolARP - Address Resolution Protocol
What protocol is responsible for resolving ip addresses to mac addresses for source hosts that knows ip addresses of the destination host but not the mac address?
ARP, or Address Resolution Protocol, defined by RFC 826.
What is chap checksum?
A CHAP (Challenge-Handshake Authentication Protocol) checksum is part of a security mechanism used in network communications to verify the identity of a user or device. During the authentication process, the server sends a challenge to the client, which then responds with a hash value generated using a shared secret and the challenge. This checksum helps ensure that the response has not been tampered with and confirms the authenticity of the client without transmitting the actual password. CHAP is commonly used in point-to-point protocol (PPP) connections.
How many multicast addresses can be supported by the IP protocol?
536870911
How many hosts does class b Internet protocol addresses have?
10000
