what is difference between Layer1,2&3 switches Please explain
- Layer 1 Switch (Physical Layer Switch):
- Operates at the Physical layer (Layer 1) of the OSI model.
- Primarily responsible for transmitting bits over a physical medium.
- It uses the MAC (Media Access Control) addresses to forward data without any modification or analysis.
- Mostly used in simple network setups or for extending network connectivity.
- Layer 2 Switch (Data Link Layer Switch):
- Operates at the Data Link layer (Layer 2) of the OSI model.
- Provides additional functionality compared to Layer 1 switches.
- Uses MAC addresses to forward data frames within a LAN (Local Area Network).
- Performs MAC address learning to build a MAC address table for efficient forwarding.
- Supports VLANs (Virtual LANs) for logical network segmentation.
- Can perform basic filtering and traffic control based on MAC addresses.
- Layer 3 Switch (Network Layer Switch):
- Operates at the Network layer (Layer 3) of the OSI model.
- Offers advanced routing capabilities in addition to Layer 2 switch functionality.
- Supports IP routing and can make forwarding decisions based on IP addresses.
- Maintains a routing table to determine the best path for data transmission.
- Can perform packet filtering and implement access control lists (ACLs).
- Enables inter-VLAN routing and can connect multiple subnets within a network.
2 Likes