Volume 2 - Chapter 18: LAN Architecture Flashcards
At what level in a tier-3 LAN would you expect the following features to reside:
* DHCP Snooping
* PoE
* QoS Trust Boundry
The access layer
At what level in a tier-3 LAN would you expect the following features to reside:
* Dynamic Routing Protocols
* Inter-VLAN routing
* ACL filtering
The distribution layer
In a 2-tier campus LAN design, the connections between the distribution and access layers provide a ____ mesh.
Partial
A 2-tier network is sometimes also refered to as a ___ ____
Collapsed Core Design.
Describe the purpose of the additional core layer in a 3-tier network.
To connect together the distribution switches, without having to connect all distribution switches directly together.
Core switches also provide a backplane for higher traffic volume due to their faster speeds
What type of mesh network is typically used in a 2-tier or 3-tier network?
A partial mesh. This is done to reduce the number of uplinks that are required.
A network design that utilizes different features from different topologies is refered to as?
A hybrid topology
What is the max speed supported on a CAT 3 cable @ 100 meters?
10 Mbps
What is the max speed supported on a CAT 5 cable @ 100 meters?
100 Mbps
What is the max speed supported on a CAT 5e cable @ 100 meters?
CAT 5e originally only had support for 1 Gbps, but was improved by the IEEE using a different standard to have support for multigig (1 Gbps, and 2.5/5 Gbps)
What is the max speed supported on a CAT 6 cable @ 100 meters?
1 Gbps
However, CAT 6 does support 10 Gbps at 55 meters
What is the max speed supported on a CAT 6A cable @ 100 meters?
10 Gbps
What is the max speed supported on a CAT 8 cable @ 100 meters?
40 Gbps
The term OM stands for?
Optical Multimode
What are the speed and core cladding specs for a OM1 cable?
- Core/Cladding Diameter: 62.5/125
- 1 Gbps up to 220 meters
- 10 Gbps up to 33 meters
What are the speed and core cladding specs for a OM3 cable?
- Core/Cladding Diameter: 50/125
- 10 Gbps up to 300 m
What are the speed and core cladding specs for a OM2 cable?
- Core/Cladding Diameter: 50/125
- 1 Gbps up to 550 meters
- 10 Gbps up to 82 meters
What are the speed and core cladding specs for a OM4 cable?
- Core/Cladding Diameter: 50/125
- 10 Gbps up to 400 m
A device (such as a switch), that provides DC power over an Ethernet UTP cable is refered to as?
Power Sourcing Equipment (PSE)
How does Power Sourcing Equipment determine if the end device that is connected supports PoE?
Using power detection; the PSE will send small amount of current to the end device.
* If the end device completes the circuit, it supports PoE
* If the end device doesn’t complete the circuit, it does not support PoE and is not a PD
In regards to PoE, describe the function of power classification.
Determining how much power the PSE can safely provide to the PD
An end device that supports power using PoE is refered to as?
A Powered Device (PD).
Describe the function of Layer 1 power classification.
Layer 1 power classification is used to supply a small power set to the end device to allow it to boot a simple OS. If successful, the PSE and PD can move onto Layer 2 power classification
Describe the function of Layer 2 power classification.
Used after the Layer 1 classification is complete. The PD and PSE will negotiate the proper PoE requirements using CDP and LLDP messages.
Out of the 4 classes of PoE, which classes utilize 2 wire pairs for power?
PoE & PoE+
Out of the 4 classes of PoE, which classes utilize 4 wire pairs for power?
UPoE & UPoE+
What is the supported wattage and power class of PoE?
15 watts, power class 0
What is the supported wattage and power class of PoE+?
30 watts, power class 4
What is the supported wattage and power class of UPoE?
60 watts, power class 6
What is the supported wattage and power class of UPoE+?
90 watts, power class 8
