Appliatien layer:

$(1)$ hiefly describec differeet types of upplication architecture with examples

$(3)$ Compare the difference botween circuit switching oressege Eand packet switching in Computer network.

$(3)$ Consider an e$-$commerne site that unats to keop a purchase record for each of its customers. Describe how this can be dene, with cookies.

$(4)$ Briefly explain the persistent and nonpersistent HTTP connections.

$(5)$ Describe how cookles are used in e$-$commerce site that wants" to keep a purchase record foreach of its customers.

$(6)$ Suppese Alices, witha web mbaced email account $($Such as Hotmail or gmail$)$ sends a mossage to Bob Who accesses his mail from his mail server using Pop $3.$ Discuss how the message gets from Alice's host to fob's host $($Indude the list of related applicatio layer protocols.$)$

$(7)$ In the Briefly discuss the $5$ layers

$(8)$ Briefly internet protociol stack. works.