what kind of network information can you gather from issuing commands on a router or switch?
When accessing a router or switch, there are several commands you can use to gather network information. Here are a few examples:
1. "show interfaces": This command will display information about the interfaces on the router or switch, including their status, IP address, and other relevant details like bandwidth utilization.
2. "show ip route": This command provides information about the routing table on the device, including the network destinations, next hop addresses, and routing protocols being used.
3. "show arp": This command allows you to view the Address Resolution Protocol (ARP) table, which provides information about the IP addresses and corresponding MAC addresses of devices on the local network.
4. "show mac-address-table": By using this command, you can view the MAC address table of the switch, which shows the MAC addresses learned by the switch on each port.
5. "show cdp neighbors": If the device supports Cisco Discovery Protocol (CDP), this command displays information about directly connected Cisco devices, including their IP addresses, platforms, and capabilities.
6. "show vlan": This command provides information about the VLANs configured on the switch, including their IDs, names, and associated interfaces.
By executing these commands on a router or switch, you can obtain valuable network information that can help with troubleshooting, monitoring, and configuring your network. To access the command-line interface (CLI) of a router or switch, you typically need to establish a connection using Telnet, SSH, or a serial console cable.