The destination address field in a frame refers to the physical (or MAC) address of the destination node.
DLCI
DLCI
SPI field
1)Source and destination MAC Address 2)FCS Field
Destination address
ignored
Destination Address (I.P. ) will stay the same during transmission. But be careful! Only if it is Ip address. However if it is MAC it will change as it travels thru diferent routers with different MAC addresses to get to the destination Ip address (which does not change)!
When a user sends an HTTP request to a web server on a remote network, the information needed to perform the action is added to the address field of a frame to indicate the destination during encapsulation.
There are two address fields. Source is the IP address the packet came from and destination is the IP address the packet is meant to be delivered to.
You enter an email address in the TO field. The Electronic Message may take many routes to its destination, before the person receives it.
Relative:- 1. In this mode the content of the program counter is added to the address part of the instruction to obtain the effective addressed. 2. Effective Address = Contents of the program counter + contents of address field. 3. No extra index bit is used. 4. Example:- EA = [ BX ] + [ SI ] + disp. EA = [ BX ] + [ DI ] + disp. Indexed:- 1. In this mode of addressing an attempt is made to avoid the use of two addressed for an operand. 2. Effective Address = Address field + contents of the specified - index registers. 3. In this extra index bit is used. 4. Example:- EA = [ BX ] + [ SI ] EA = [ BX ] + [ DI ]
post indexing First, the contents of the address field are used to access a memory location containing a direct address. This address is then indexed by the register value. pre-indexing An address is calculated as with simple indexing. In this case, however, the calculated address contains not the operand, but the address of the operand.