14 COMMUNICATION

Select the reasons for using protocols in Internet communication

• Alllow communication between devices operating on different platforms

• Data sent and received using the same format

• ^{Communication depends on hardware compatibility}

• Data is sent using same rules but received using different rules

Select the tasks done by the Application Layer

• Handle access to services

• Handle forwarding of packets

• Manage data exchange

• Define the protocols used

• - Provides rules for exchange of packets over the Internet

  • - Decides the path for transmission of each packet

• Internet Protocol

• Transmission Control Protocol

• IMAP

• HTTPS

Select the information appended to form a segment in the Transport Layer

• Source port

• Checksum

• Destination port

• Source MAC address

• Frame check sequence

At the Internet Layer, data is encapsulated into

(a)  

These information are appended to data at which layer?

• - IP source & destination

• - Protocol used

• - Hop number

• Application layer

• Transport layer

• Internet layer

• Link layer

Select the information appended to form frames in the Link Layer

• Acknowledgement number

• IP address of source

• MAC address of source

• Frame check sequence

Select the items included in a routing table

• Network ID

• IP address of closest hop

• IP addresses of next hops

• Routing metric

Select the roles of the Link Layer

• Transport IP packets across individual links on a path

• State the port number used to send & receive data

• Produce IP packets

• Define software and hardware requirements to send data

• Send data to the next router

Used for receiving emails

• HTTPS

• SMTP

• POP

• IMAP