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Why would you choose to use a layer 2 device over a layer 3 device?
A Layer 2 switch works with MAC addresses only and does not care about IP address or any items of higher layers. A Layer 3 switch, or multilayer switch, can do all the job that a Layer 2 switch does. Additionally, it can do static routing and dynamic routing.
What is the difference between a layer 2 switch and a layer 3 switch?
A layer 2 switch only knows ethernet, you may be able to setup VLANs. Simply put, a layer 3 switch can forward packets between different networks like a router while layer 2 switches forward packets to different segments/or within a given network.
Which is better layer 2 or Layer 3 switch?
Layer 2 switches are used to reduce traffic on the local network, whereas Layer 3 switches mostly used to Implement VLAN. The advantage of Layer 2 switches is that it helps to forward packets based on unique MAC addresses. The advantage of Layer 3 switches offers flow accounting and high-speed scalability.
When would you use a layer 2 switch?
A layer 2 switch is primarily responsible for transporting data on a physical layer and in performing error checking on each transmitted and received frame. A layer 2 switch requires MAC address of NIC on each network node to transmit data.
Is VLAN tagging Layer 2 or layer 3?
VLANs are data link layer (OSI layer 2) constructs, analogous to Internet Protocol (IP) subnets, which are network layer (OSI layer 3) constructs.
Which is a layer 2 switch or a layer 3 switch?
A layer-3 switch is primarily a layer-2 switch, but with a routing module in it. A layer-3 switch that is not configured with multiple networks is simply a layer-2 switch. Routers, including the routing module in a layer-3 switch, route traffic between networks.
Can a layer 3 switch access a DMZ?
If you’ve used a layer-3 switch, then your DMZ is presumably not physically isolated. If the switch exposes a management interface to the DMZ, then attackers could access the switch and escape the DMZ. It’s a best practice to have the DMZ as isolated as possible.
What does it mean to have a DMZ network?
What is a DMZ Network? A demilitarized zone (DMZ) is a perimeter network that protects an organization’s internal local-area network (LAN) from untrusted traffic. A common DMZ meaning is a subnetwork that sits between the public internet and private networks.
Why do we need a layer 2 address?
Use of point-to-point links is the primary reason for lack of layer-2 addresses in Fibre Channel networks (regardless of the violent disagreement I get every time I mention this). The first time you truly need unique addresses is layer-3, which should provide end-to-end packet delivery across the network.