Switching Flashcards
What are the three layers of the Hierarchical Model? What are the major functions and requirements of each?
• Core - transmitting traffic at high
speeds. Low overhead and high
bandwidth are necessary.
• Distribution - aggregates access nodes and uplinks. Implementation of policies like filtering, security and QoS. High availability through redundancy and appropriate software.
• Access - provides access and
aggregation for users. Feature-rich.
Stackable switching
Having multiple switches that appear and act as a single switch.
What is meant by the consumerization of network access?
The fact that consumer devices (smart phones, tablets) are increasingly used for business purposes and need to be accommodated by business networks.
PPDIOO
- Prepare
- Plan
- Design
- Implement
- Operate
- Optimize
What information does the show VLAN command provide?
All valid VLANs, their names, their statuses and which ports belong to them.
What is 802.1q?
A trunking encapsulation mechanism that adds VLAN tags to frames traveling over a trunk.
What is another term for a trunk?
Inter-switch link
The only trunking negotiation scenario that ends up negotiating (or defaulting to) an access link is:
Both ports set to “auto”
The only trunking negotiation scenario that results in limited connectivity is:
One port set to “trunk” and the other set to “access”.
What is the command to set a trunk’s encapsulation method to 802.1q?
(config-if)# switchport trunk encapsulation dot1q
What is the command to turn off trunking negotiation?
(config-if)# switchport trunk nonegotiate
only use this when manually configuring a trunk
What does VTP stand for and what is its function?
VLAN Trunk Protocol (VTP) reduces administration in a switched network. When you configure a new VLAN on one VTP server, the VLAN is distributed through all switches in the domain. This reduces the need to configure the same VLAN everywhere. VTP is a Cisco-proprietary protocol that is available on most of the Cisco Catalyst series products.
Why is using VTP sometimes dangerous?
A VLAN configuration on a VTP server can overwrite existing configurations on switches. eg: if you had a VTP server with no configured VLANs, it will overwrite the configuration of all switches in the domain and delete any previously configured VLANs.
What’s the command to designate a protected port?
(config-if)# switchport [no] protected
How many community and isolated VLAN’s can you have per primary VLAN?
Multiple community VLANs but only one PVLAN