VLAN vs. Subnet

“What is the difference between a subnet and a vlan? How does a subnet and vlan work differently from each other?” “While going through the CCNP switch book of CISCO, I encountered this statement “The switch port supports one VLAN,…
Show environment Command

To display temperature, voltage, fan, and power supply information, use the show environment command in user EXEC or privileged EXEC mode. The following outputs are from Cisco 7206VXR. To display all available syntax, use the show environment? (As shown in…
Show controllers command

“I’m a little confused on what the “show controllers” commands really do… can someone clarify? Based on the output, I’m inclined to suspect that it provides mostly physical layer type information about an interface. From a troubleshooting perspective, when is…
Quiz Questions to Know Wireless LANs

Do You Know This Wireless LANs? Wireless LAN Concepts, Deploying WLANs, Wireless LAN Security. There are 9 quiz questions to know the key points of WLAN. Questions 1-4: Wireless LAN Concepts Questions 5-7: Deploying WLANs Questions 8-9: Wireless LAN Security…
Switchport Security & Configuration

One of the most overlooked security areas is the configuration of individual switchport security configuration. The reason may be that it requires a more granular configuration; this is because a typical configuration requires the knowledge of the specific MAC address(es)…
Is Cisco Bothering With “Open” EIGRP?

EIGRP is an example of an Interior Gateway Protocol (IGP), which is a network routing protocol that routers use to exchange routing information within an autonomous system (AS). EIGRP takes its place alongside other frequently-encountered IGPs such as Routing Information…
How to Configure NAT in Cisco IOS?

NAT (Network Address Translation), it in simple terms translates an IP address into another. Network Address Translation is of different types like Static NAT (One to One) Dynamic NAT (Many to Many) Overloading (Many to One) The main purpose of…
VLAN Trunking Protocol (VTP) & VTP Modes

What is a VLAN Trunking Protocol (VTP)? “VTP allows a network manager to configure a switch so that it will propagate VLAN configurations to other switches in the network” VLAN Trunking Protocol (VTP) is a Cisco proprietary Layer 2 messaging…