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Application Layer
The application layer is where network applications and their application layer protocols reside. The internet application layer includes many protocols such as the HTTP ( which provides for web document request and transfer) SMTP ( which provides for the transfer of e mail message) and FTP ( which provides for the transfer of tiles between two end systems. We ii se that certain network functions such as the translation of human friendly names for internet end systems like Gaia. Cs yahoo. Com to a 32 bits networks address are also done with the help of an applications layer protocol the domain name systems ( DNS).
Question: (a) With the help of a diagram, describe a typical DNS system. (b) Using signal sequence or state transition diagrams, illustrate the following scenarios: i.
Question 1 Discuss the following Evolution of Data Communication Elements of Data Communication System Question 2 Explain the following
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
compare routing algorithms with non adaptive algorithms
What are the features of star and ring topology The three networks have following features: star: best case is = 2, average case is = 2, worst case is = 2 ring: best case
Thicknet Characteristics It Supports transmission rates up to 10 Mbps in Baseband mode Less expensive in comparison of fiber-optic cable however more expensive than ot
What is SAP? Series of interface points that permit other computers to interact with the other layers of network protocol stack is known as SAP.
Explain the meaning of Disassociation A notification from either a station or an AP that an existing association is terminated. A station should provide this notification befor
Ask Design private subnetworks (using Class A range for CIDR) for each domain as in the table below, and complete the table. Hints: Consider how many network bits are required to a
What is a Counter A software code that indicates how many times a site has been visited. It gets automatically updated and is usually represented by a small rectangle with n
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