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There are times when using packet filters makes sense. If the connections require high throughput or the protocols has proprietary technology that makes it not compatibles with other firewall technologies a packet filtering firewall might be in order. Although packet filters have limitations they also have the followings advantage over other firewall technologies.
a.Compatibility packet filters do not modify the packet stream so they works with any protocols.
b.Performance packet filters are very fast since they look only at the headers.
c.Scalability since packets filters are simple it is easy to scale the solution.
PING - Packet Internet Gopher A utility that shows connections to one or more remote hosts. The ping command uses the ICMP echo request and echo reply packets to verify whether
definition
Q. Show the Character-level Encryption? - Substitutional - Monoalphabetic - simplest form; also called Caesar cipher - Every character is replaced with another character
different framing methods
Link Layer To move to packet from one node( host or packet swtich0 to net node in the route the network layer relies on the services of the link layer. Particularl
Q. What is Transmission Media? - Actually situated below the physical layer - Directly controlled through the physical layer - Data should be converted into electromagnet
WHAT IS NETWORK???
Destination unreachable Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Describe Concept of Simplex, Half Duplex and Full Duplex dialogs?
Link State Packet When a router floods the network with information about its neighbourhood. It is said to be advertising. The basis of this advertising is a short pack
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