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Application Layer
The application layer enables the user whether human or software to access the network. It provides user interfaces and support for services such as electronic mail, fire access and transfer access to systems resources surfing the world wide web and network management. In this part we briefly discuss some applications that are designed as a client server pair in the internet. the client sends a request for a service to the server the server responds to the client.
In this chapter we will briefly the key application layer concepts including application layer protocol clients and servers. Processes sockets and transport layer interface and full explanation of several network applications in detail including the web e mail DNS ( Domain Name Server) and P2P ( point to point) file sharing.
Private Networks The information routes from one networks to another network through a leased line. If an organization needs privacy can use a private networks or networ
The steps of forwarding the packets of information is known routing. The information about receivers is saved in routing tables. Note that several entries have same next hop. It is
what is difference between Star and Mesh topology?
Explain the term- congestion The average queue size over the last cycle and the current cycle is calculated. This value is the threshold. By averaging over two cycles instead o
Network Criteria - Performance - It is able to be measured by transit time and response time. Affected by type of medium, number of users and connected HW/SW - Reliability
Determine about the Address Translation When a Web site address or URL is typed in the Web browser, as www.bbc.com and not as a series of numbers, it is essential for the serv
In case of any new event switch do broadcast, after that always do Unicast.
Q. Define Name Space in domain name system? - All names assigned to machines on an internet - Must be unique; either flat or hierarchical - Flat name space - name is assi
Q. What is Bus Topology? Multipoint configuration One cable acts like a backbone to link all devices Advantages: Effortlessness of installation and less cabling
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