CompTIA Network+ Network+ Network Implementation 3

Question 1

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

Accepted Answer

10GBASE-T on Cat6

Answer

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

Question 2

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

Accepted Answer

VLAN 1

Answer

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

Question 3

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

Accepted Answer

EIGRP

Answer

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

Question 4

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

Accepted Answer

Channel overlap with neighboring APs

Answer

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

Question 5

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

Accepted Answer

PAT (Port Address Translation)

Answer

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

CompTIA Practice Test