December 2005
Intermediate to advanced
1032 pages
29h 12m
English
Content preview from The Complete Cisco VPN Configuration Guide
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Fragmentation Problems
IP supports a maximum length of 65,536 bytes for an IP packet; however, most data-link layer protocols support a much smaller length, called a maximum transmission unit (MTU). Based on the supported MTU, it might be necessary to break up (fragment) an IP packet to transmit it across a particular data-link layer media type. The destination then would have to reassemble the fragments back into the original complete IP packet.
The problem with fragmentation is that it requires additional CPU and memory resources on devices performing fragmentation. This is not to say that the actual source and destination will perform the fragmentation. For example, assume that the source and destination are on a Token Ring network with an ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.