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Router is a layer 3 or 4 device if your ans is layer 3 then while applying an extended access list on router interface how specifying port no is aloud as it comes under layer 4 protocols?
A router is a layer 3 device.In general, a Layer-3 switch (routing switch) is primarily a switch (a Layer-2 device) that has been enhanced or taught some routing (Layer 3) capabilities. A router is a Layer-3 device that simply do routing only. In the case of a switching router, it is primarily a router that may use switching technology (high-speed ASICs) for speed and performance (as well as also supporting Layer-2 bridging functions). As illustration, here are some examples Layer-2 switches Cisco: Catalyst 2950, 2960 series Layer-3 switches or routing switches Cisco: Catalyst 3550, 3560, 3750, 4500, 6500 series Juniper: EX series Routers (with some bridging and/or security features) or switching routers Cisco: 1800, 1900, 2600, 2800, 2900, 3700, 3800, 3900, 7200, 7600, ASR 1000 series Juniper: MX series, J series, M series
How does information get passed from one layers to the next in the internet model?
Each layer in the sending device adds its own information to the message it receives from the above layer and sends it to the layer below it. At layer 1 the entire package is converted to a form to be transmitted to the receiving device. On the receiving device side, the package is unwrapped layer to layer. Each layer removes data meaningful to it and sends the rest to the above layer and so on. Hope this was helpful By nour el houda
Which of the following is considered a Layer 2 device?
Switches are generally considered layer 2 devices, but many are capable of operating at layers 3, 4 or higher. Most hubs are amplifying the electrical signal; therefore, they are really repeaters with several ports. Hubs and repeaters are Layer 1 (physical layer) devices.
Which OSI layer handles framing and routing?
Framing is done at the Data Link layer (Layer 2). Routing is done at the Network layer (Layer 3).
Switch work in which layer of osi modle?
layer 3 layer 3 Switch/ Bridges / Hubs works at layer 2 as they utilizes MAC address to communicate. However i aggree above stated answer as there are some layer three switches that work at Layer3 i.e. Network Layer. Dhruv
Which are layer 1 switches?
There are no layer 1 switches; switches run at layer 2 or 3. A hub is a layer 1 device.
What device do you need to connect 2 VLANs?
A layer 3 switch or a router.
Which devices work in the presentation layer?
firewall, router,layer 3 switches and i approve that answer ! NO! In general the firewall is a layer 4 device, it traffics filter incoming and outgoing ports. It uses the function of TCP and UCP. However a Firewall can also be a layer 3 device as in internal firewall in a router. Also a switch is a layer 2 device unless your talking about a Router switch.
Why do you call router as layer three device?
Routers operate in layer 3 because they must use the logical network address to determine which network to route the packet to. Logical addressing is a feature of layer 3, therefore a router is a layer 3 device.
What facts are true when a device is moved from one network or subnet to another?
• The device will still operate at the same Layer 2 address.• The Layer 3 address must be reassigned to allow communications to the new network.
What device is also called a Layer 3 switch?
i do no
What is the highest layer of the OSI model used by router?
Router works in Network Layer of OSI model
What kind of device is a multilayer switch considered to be?
Layer 3
Will a Cisco 4000 switch automatically switch from layer 3 to layer 2?
I believe there is no such thing as switching "from layer 3 to layer 2". Switching is either done within layer 3, or within layer 2.
Which device eliminates broadcast storms?
a router and a layer 3 switches.
What is device in connecting TWO LAN?
a router or layer-3 switch.
Which device connect 2 LANs and control data flow between them?
A router or a Layer-3 switch can connect 2 or more LANs together and control data flow between them.
