OSI model/ Protocols

Question 1

OSI Model Layers

Answer 1

1. Physical
2. Data Link
3. Networking
4. Transport
5. Session
6. Presentation
7. Application

Question 2

TCP/IP Model Layers

Answer 2

1. Physical
2. Internet (Network)
3. Transport
4. Application

Question 3

Physical Layer

Answer 3

Responsible for the physical connection between devices, including the transmission of raw data bits over a medium like cables or wireless signals.

Question 4

Data Link Layer

Answer 4

Manages data transfer between devices on the same network, including error detection and correction, and adds MAC addresses to identify devices on the local network.

Question 5

Network Layer

Answer 5

Determines the best route for data packets across a network by managing logical addressing (IP addresses) and routing data between networks.

Question 6

Transport Layer

Answer 6

Ensures reliable end-to-end data delivery between applications on different hosts by managing flow control, error checking, and segmentation.

Question 7

Session Layer

Answer 7

Establishes, manages, and terminates communication sessions between applications on different devices, including synchronization points.

Question 8

Presentation Layer

Answer 8

Translates data formats between the application layer and the network, including data encryption, compression, and data type conversion.

Question 9

Application Layer

Answer 9

Provides direct interaction with user applications, including email, file transfer, and web browsing, and is responsible for network services accessible to users.

Question 10

TCP (Transmission Control Protocol)

Answer 10

Provides reliable, connection-oriented data transmission, guaranteeing data arrives in the correct order and intact, essential for applications requiring high data integrity.

Ex. Web Browsing

Transport Layer

Question 11

IP (Internet Protocol)

Answer 11

Responsible for addressing and routing data packets across networks, allowing data to travel from source to destination.

Network Layer

Question 12

HTTP (Hypertext Transfer Protocol)

Answer 12

Used for web browsing, enabling communication between web browsers and servers to transfer HTML files and other web content.

Application Layer

Question 13

HTTPS (Hypertext Transfer Protocol Secure)

Answer 13

A secure version of HTTP that uses encryption to protect data transmitted over the web.

Application Layer

Question 14

DNS (Domain Name System)

Answer 14

Translates human-readable domain names into machine-readable IP addresses, allowing users to access websites using easy-to-remember names.

Application Layer

Question 15

SMTP (Simple Mail Transfer Protocol)

Answer 15

Standard protocol for sending emails across the internet.

Application Layer

Question 16

UDP (User Datagram Protocol)

Answer 16

A connectionless protocol prioritizing speed over reliability, suitable for real-time applications like video streaming where some data loss is acceptable.

Transport Layer

Question 17

FTP (File Transfer Protocol)

Answer 17

Used for transferring files between devices.

Application Layer

Question 18

DHCP (Dynamic Host Configuration Protocol)

Answer 18

Automatically assigns IP addresses to devices on a network.

Application Layer