Basic Switching Concepts Flashcards

Which of the following correctly describes a broadcast domain in a switched network?

Answer: All devices in the same VLAN

All devices in the same VLAN share one broadcast domain; switches by default do not contain broadcasts between VLANs.

A port security violation in 'restrict' mode results in which behavior?

Answer: Frames are dropped and a syslog/SNMP notification is generated

Restrict mode drops frames from violating MAC addresses and increments the security violation counter while sending syslog and SNMP notifications.

Which store-and-forward switching characteristic makes it preferred in networks that require high reliability?

Answer: Error checking using CRC before forwarding

Store-and-forward switching receives the entire frame and performs a CRC check before forwarding, ensuring corrupted frames are never forwarded.

Which command removes all dynamically learned MAC addresses from a Cisco switch's MAC address table immediately?

Answer: clear mac address-table dynamic

'clear mac address-table dynamic' immediately removes all dynamically learned entries from the MAC address table.

What is the purpose of the 'switchport nonegotiate' command on a Cisco switch port?

Answer: Disables DTP so the port does not send DTP frames

'switchport nonegotiate' disables DTP negotiation, preventing the port from sending or responding to DTP frames.

On a switch, what does the term 'asymmetric switching' refer to?

Answer: Switching between ports that have different bandwidth speeds

Asymmetric switching provides switched connections between ports of unequal bandwidth, such as between 100 Mbps and 1 Gbps ports.

Which Cisco IOS command statically adds a MAC address entry to the MAC address table for VLAN 10 on interface Fa0/1?

Answer: mac address-table static 0011.2233.4455 vlan 10 interface fastethernet 0/1

The 'mac address-table static' command manually creates a permanent MAC address entry, binding the address to a specific VLAN and interface.