Network+ Network Implementation Flashcards

Which cable standard supports 10 Gbps over distances up to 55 meters using existing Cat6 cabling?

Answer: 10GBASE-T on Cat6

10GBASE-T can run on Cat6 but is limited to 55 meters due to alien crosstalk; Cat6a extends this to 100 meters.

An administrator configures a switch port with 'switchport mode trunk'. What is the default native VLAN on most Cisco-compatible switches?

Answer: VLAN 1

VLAN 1 is the default native VLAN on 802.1Q trunk links; frames on the native VLAN are transmitted untagged.

Which routing protocol uses bandwidth and delay as its default composite metric?

Answer: EIGRP

EIGRP uses a composite metric calculated from bandwidth and delay by default, though load, reliability, and MTU can also be included.

A wireless client is experiencing slow speeds despite having good signal strength. Which issue is most likely?

Answer: Channel overlap with neighboring APs

Co-channel and adjacent-channel interference from overlapping APs degrade throughput even when signal strength (RSSI) is adequate.

Which technology allows a single internet IP address to be shared among multiple internal hosts by tracking connection state?

Answer: PAT (Port Address Translation)

PAT (also called NAT overload) maps many private IP:port combinations to a single public IP using unique source port numbers to track sessions.

A network administrator wants to ensure that only the first MAC address learned on a switch port is allowed. What feature should be configured?

Answer: Port security with sticky MAC

Port security with sticky MAC learning locks the port to the first MAC address it learns and can disable the port if a different device connects.

Which PoE standard delivers up to 30W per port and is defined by IEEE 802.3at?

Answer: PoE+ (802.3at)

IEEE 802.3at (PoE+) delivers up to 30W per port, while 802.3af delivers up to 15.4W and 802.3bt delivers up to 90W.