Routing IP routing connects VLANs together and routes packets between them. Routing devices use Layer 3 packet analysis to forward L3 packets. Layer 2 switches forward frames among devices in the same LAN by processing Layer 2 headers. This is based on destination MAC addresses. Layer 3 devices move packets between LANs based on Layer 3 IP addresses. Routing Layer…
Month: May 2024
6. Link Aggregation
Link Aggregation Without link aggregation, if you used two links to connect two switches together, the two links would create a loop and STP would automatically block one of the ports. Link Aggregation fixes this issue by bundling multiple physical interfaces into a single logical interface. Since STP sees this as a single interface there is no blocking. …
5. Spanning-Tree Protocol
Redundancy In the above example on the left, if Core 1 fails then the network is down and client A won’t be able to communicate with client B. In the example on the right, if Core 1 fails the network will say up as Core 2 is available and the Client can communicate through this. While this mitigates a single…
4. VLANS
VLANS VLANs are used to isolate endpoints so you have better control over the traffic Default VLAN is VLAN 1 Devices in the same VLAN can communicate without routing. Collison Domains On a Layer 1 Hub, only one ethernet host on a particular segment may transmit at a time, otherwise there is a collision. This is controlled by an…
Aruba Certified Switching Associate – Study Notes
These are my study notes from the book: “Aruba Certified Switching Associate – Official Certification Study Guide (Exam HPE6-A72)” 4. VLANS 5. Spanning-Tree Protocol 6. Link Aggregation