22 - TCP/IP Stack: Application Layer

Question 1

What is the Application layer of the TCP/IP stack?

Answer 1

Programs running on different hosts that want to communicate

In short: User-program interation & protocol

Question 2

Examples of programs that run through the Application Layer

Answer 2

• HyperText Transfer Protocol (HTTP) - Webpages
• Simple Mail Transfer Protocol (STMP) - Email
• Domain Name System (DNS) - name resolution
• Secure Shell (SSH) - encrypted remote shell access

Question 3

What does the Dynamic Host Configuration Protocol do?

Answer 3

It helps set up a new computer and allows it to connect to the network to start up.

• Helps identify:
  
  • Gateway router
  • DNS server

Question 4

What is the DNS?

Answer 4

Domain Name System

• What you need to communicate with another host (i.e. IP address)
• Internet’s phonebook