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Mail Message Format
When an e mail is sent from one person to another a header containing peripheral information precedes the body of the message itself. This contained information is contained in a series of header lines. The header liens and the body of the message are separated by a blank line. Each header line contains readable ext consisting of a keyword followed by a colon followed by value. some of the keyword are required and others are optional. Every header must have a from header line and a to header line a header may include a subject header line as well as other optional header liens a message header looks like this.
The to field gives the address of the primary recipient. Having multiple recipients is also allowed. The cc field gives the addresses of any secondary recipients. In terms of delivery there is o distinction between the primary and secondary recipients. The terms cc ( carbon copy0 is a bit dated since computers do not use cardoon paper but it is well established. The Bcc( Billed carbon copy) field is like the cc field except that this line is deleted from all the copies sent to the primary and secondary recipients. This feature allows people to send copies to third parties without the primary and secondary recipients knowing this. The next two field from and sender tell who wrote and sent the message respectively. A line containing received is added by each message transfer agent along the way. The lien contains the agents identify the date and data and time the message was received and other information that can be used for finding bugs in the routing systems. The return path field is added by the final message transfer agent and was intended to tell how to get back to the sender.
Fast Ethernet Operates at 100 Mbps faster speeds required for image processing, CAD, real-time audio and video No change in frame addressing, format or access method
To split data in pieces is known as segmentation and divide segmentation in pieces called Fragmentation. #question..
Question 1 Explain the TCP/IP protocol suite. List (Network Interface Layer, Internet Layer, Transport Layer, Application Layer) Question 2 Write short note on
Mesh : This is two dimensional networks. In this all processing elements are organised in a two dimensional grid. The processor in the row i and column j are indicated by PE i .
In the VOIP system, let h be the total number of header bytes added to each chunk, including UDP and IP header. a) Assuming an IP datagram is emitted every 20 msec, find the tr
Disadvantages You typically would not use a packet filter as your only security solution for your network packets filters have two major disadvantages. a. Low securit
confiriguration,capabilities,implementation
What is Beaconing? The process that permits a network to self-repair networks problems. The stations on the network notify the other stations on the ring when they are not rece
Electronic Cheques Another mechanism for Internet payment is electronic cheques. With electronic cheques, the payer (either an individual consumer or a business) instructs his
WAN interface card(WIC) slots Two fixed WIC slots are present in 2600 series router except 2691. It has contained 3 WIC slots. Network Module Expansion Slot( NM) slot
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