Layer 2 Switching Flashcards
When you use a set of bridges and routers to segment your LAN into smaller networks, what results will you get?
(1) Decreased congestion on each segment, and (2) increased number of collision domains.
When you segment a network with a router, what results will you get?
(1) Fewer devices per broadcast domain and (2) increased number of collision domains.
Will connection hosts and servers to their own dedicated port on a switch reduce the broadcast domains?
No, broadcast packets will be sent to all ports.
Describe cut-through switching
The switch copies only the destination address of the frame into its buffer and the switch reduces latency by forwarding the frame almost immediately.
Describe fragment-free switching.
The switch reads the first 64 bytes of the frame, verifies that a collision has not occurred, and switches the frame to the correct port.
What is a collision domain?
Networks connected to a router make up a collision domain. All devices connected to a hub will also make one collision domain.
On a new switch, the switch learns the location of devices by examining the _________ IP address.
source
What is the role of distribution switches and how are they implemented?
Linked to each other via high-speed connections, connected to high-speed core switches, and constitute the second tier in a two-tier network design.
Describe core switches and how they are implemented.
They reduce the number of uplinks required to connect each building to the campus network, provide high speed connections between distribution switches and are not used in a two-tier (collapsed core) network design.
A Cisco switch out of the box is ______ on all its ports.
Live
What things should you configure on a cisco switch?
Passwords, IP address, default gateway
How would you configure the speed and duplex settings on a Cisco Switch?
enable configure interface range [ex. f0/1-24, f0/25-27] OR interface [name] speed [mb/auto] duplex [full/half/auto]
How do you administratively shutdown a port to prevent “plug and play” Switch connectivity on a port?
enable configure interface range OR interface shutdown
How do you enable or disable a switch interface?
no shutdown (enable) shutdown (disable)
How do you show interface status of all ports?
show interface status