September 2015
Intermediate to advanced
527 pages
14h 8m
English
Content preview from Cloud Computing Networking
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297internet ProtoCol seCurity
be protected by IPSec. With these advantages, the IPSec technology has been widely
used by VPNs to secure IP communication on the public Internet.
On the other hand, IPSec has a few disadvantages. It consumes more computing
resources due to the computation of encryption/decryption and authentication. It con-
sumes more network bandwidth and has lower performance than that of a regular IP
packet. When the tunnel mode is implemented, the local network is not protected by
IPSec. is may open the door for network viruses such as worms, which can easily
spread across the entire local network. When the transport mode is ...
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