IP Address, MAC Address, and Port Address: A Comprehensive Guide | Computer Network

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[@psycho_Aresyt]

You are the real hero sir ....for entc students

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[@PrithaMajumder]

Sir, Thanks a lot for This Amazing Lecture 🙂 Lecture - 6 Completed ✅ in OSI Model in Computer Network

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[@arunrawat4271]

ek number

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Your Appreciations, care and share matters a lot to me. #EnginneringLove. All the subjects playlist of Engineering Funda is available in comment section. Share it with your friends to support us. Your positive comments motivates me and person like me get boosted by my students feedback. Thanks and welcome 🙏

[@luckymaurya7098]

Sir your lectures are amazing and very helpful for us ❤. Can you please provide these notes

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For that you have to go through my Android Application Engineering Funda

[@luckymaurya7098]

@@EngineeringFunda I have already downloaded, bt only interview questions were there. Are they free or paid ?

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[@malaviyaparth7979]

Hello sir Are you from surat ?

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Yes I am

[@mdyusufansari8897]

if a packet comes from internet then my router can just send it to my private ip address why Mac address is needed then

[@EngineeringFunda]

When a packet comes from the internet to your router, the router needs both the IP address and the MAC address to successfully deliver the packet to the correct device on your local network. Here's why both addresses are necessary: 1. **Routing at the Network Layer (IP):** Routers operate at the network layer (Layer 3) of the OSI model. They use IP addresses to route packets between different networks. When a packet arrives at your router from the internet, the router examines the destination IP address to determine which device on your local network should receive the packet. 2. **Local Network Delivery at the Data Link Layer (MAC):** Once the router knows which device on your local network should receive the packet based on the IP address, it needs the MAC address to deliver the packet at the data link layer (Layer 2). The MAC address is used for communication within a local network. Each device on a network has a unique MAC address assigned to its network interface card (NIC). The router uses the ARP (Address Resolution Protocol) to map the IP address to the corresponding MAC address within the local network. In summary, while IP addresses are used for routing packets between networks, MAC addresses are used for delivering packets within a local network. The combination of both addresses allows the router to correctly route the packet to the specific device on the local network.