– OSI model is like a seven-layer cake, with each layer having its own unique flavor π°
– IP address is like your home address, it’s how devices find each other in the cyber world π
– Hub is dumb, switch is smart, and router connects different neighborhoods ποΈ
– RJ45 is the connector that makes all the internet cables click π
– DNS turns human-readable names into machine-friendly numbers, like a magical translator π§
– Routing is like choosing the best path in a big city, with default, static, and dynamic routes as the different routes you can take πΊοΈ
– Ping is like sending a message to check if someone’s home, but for computers π‘
– AD value is the trustworthiness of different routing protocols, with lower AD values being more trusted π‘οΈ
Stay tuned for more juicy insights in part two! π¬
# TOP 20 CCNA Interview Questions & Answers | PART 1
## π OSI Model Overview
The OSI model, also known as the Open System Interconnection model, is a seven-layer reference model developed by ISO in 1984. It is vital to remember that each layer has specific functionality, which includes the physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer.
| Layer Number | Layer Name |
| ————– | ————– |
| 1 | Physical |
| 2 | Data Link |
| 3 | Network |
| 4 | Transport |
| 5 | Session |
| 6 | Presentation |
| 7 | Application |
## π Understanding IP Address
An IP address is essentially the identity of a device required for communication. It can be either a 32-bit or 128-bit address, depending on whether it is an IPv4 or IPv6 address, respectively.
| IP Type | Address Bit |
| ——— | ————- |
| IPv4 | 32-bit |
| IPv6 | 128-bit |
## π‘ Differentiating Hub, Switch, and Router
A hub operates at the physical layer and connects multiple devices, a switch is a layer two device that uses MAC addresses for communication, and a router operates at layer three, using IP addresses to connect different networks.
## π Understanding RJ45 Connector
RJ45 is a connector used for ethernet cables and is a commonly asked question in interviews.
## β‘οΈ Purpose of DNS
The Domain Name System translates domain names into IP addresses, making it easier for users to access websites with human-readable names.
## π Insight into Routing and Routing Protocols
Routing is the process of forwarding packets from one network to another, performed at the Network layer by a router using a routing table. There are different types of routing, including default routing, static routing, and dynamic routing using routing protocols.
## π Understanding Ping Tool
Ping is a tool used to test the layer three reliability of a host in a network, providing information about packet success and latency.
## π Importance of Ad Value
Ad value, related to routing protocols, determines the trustworthiness of routes learned through routing protocols. Different routing protocols have specific ad values that determine the priority of routes.
Stay tuned for PART 2 of the video in the next installment! Thank you and have a great day!
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