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Firewall
The NAT router allows receiving of number of a data streams. If it receives a transmission in the form of acknowledgement or data streams or error responses from an external server due to a particular request from an internal user, then it will receive the data, translate the address to local IP address and forward it to the requesting user. By preventing all incoming requests or connections except those expected or permitted, the router acts as a "firewall".
Q. Define the Network Security? The Internet and Web technology presents enormous promise for e-commerce. Web now is used to handle important business assets that became the
Quetion: An amplifier increases the peak-to-peak voltage of a signal from 1 V to 20 V. What is the amplifier's gain in dB?
ARP sent the request in broadcast, response is unicast When a source sends ARP request the switch broadcast the ARP req. if it doesn't have the destination mac address in its ma
Addresses are necessary for virtually everything we do on the Internet. In TCP/IP the IP is a mechanism for providing addresses for computers on the Internet. Internet addresses ha
Q. Applications of networks? End systems (hosts): - Run application programs - Example email, Web - At -edge of network Client/server model - Client host
Multicast Routing Protocols Multicast group addresses are assigned by IANA [Internet Assigned Numbers Authority for well known services and protocols. Information is exchang
Question: (a) The diagram below shows a configuration of Internet routers (A-F) which achieve dynamic routing through the use of a Distance Vector routing algorithm. The metr
What is NIC and WAN? NIC is short for Network Interface Card. This is a peripheral card that is joined to a PC in order to connect to a network. Each NIC has its own MAC addres
Q. TCP – numbering bytes? Numbering is utilized for flow & error control Segments aren't numbered only bytes Full-duplex connection - numbering is independent in
REPEATERS: Repeaters are needed when copper wire communication is takes place. According to the fact that electrical signal goes weaker while travelling over copper lines. A
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