Leading two octets of message digest: L, To enable the recipient to determine if the correct public key (k(A) e ) was used to decrypt the message digest for authentication, by comparing this plaintext copy of the first two octets with the first two octets of the decrypted digest. These octets also serve as a 16-bit frame-check sequence for the message, for authentication and error detection.
APIPA - Automatic Private IP Addressing uses a range of addresses 169.254.0.0-169.254.255.255 with a subnet mask of 255.255.0.0. If your address starts with 169.254, there is a good chance you are using APIPA.
FalseEven if your network does not need or use APIPA, leaving it enabled is not necessarily problematic, because APIPA is designed to first check for the presence of a DHCP server and allow the DHCP server to assign addresses. In addition if a computers IP address has been assigned statically, APIPA does not reassign a new address. It only works with clients configured to use DHCP. APIPA can be disabled ,However, by editing the Windows operating system registry.
maximum 60 octets minimum 20 octets
yes
One benefit of APIPA is that it allows you to personalize and configure your IP address. It also is completely free.
The four octets make up a complete address. The first part refers to a network, the remainder an individual computer in a host; however, the exact size of this "first part" may vary.
An APIPA stands for, Automatic Private IP Address. Basically the majority of people use DHCP to obtain there IP address and configurations. For this to work, a DHCP server must be running. DHCP servers are found in home routers, gateways, modems, or corporate servers. However, If there is no DHCP server that is reachable, you will get an APIPA. APIPA is a range of IP address just for Microsoft operating systems. An APIPA ranges from 169.254.0.1 through 169.254.255.254. When it is activated, it constantly looks for a DHCP server to get a configuration from. When it finds a proper configuration, APIPA is disabled.
The first octet determines what class of network you are located on. From that, you can determine how many of the octets represent the network address, and which part represents the client or host portion. IP addresses in version 4 (iPv4) are divided into two segments: the network id and the host id. Knowing the range of network class addresses will help: Class A is 0 - 126 and uses only the first octet for the network portion Class B is 128 - 191 and uses the first two octets for the network id Class C is 192 - 223 and uses the first three octets for the network id An example would be: 192.168.1.5 is a class C address, so we use the first three octets for the network id. This gives a network id of 192.168.1.0 and a host id of 5 in that network.
APIPA addresses are in the range 169.254.0.1 through 169.254.255.254. These would be in the Class B address range.
No, because first three octets are suppose to be same and they are not.
APIPA is an acronym that stands for "Automatic private internet protocol addressing." It is used solely for communicating in a link or a local networking system.