Identify the Letter of the Choice That Best Matches the Phrase

Multiple Choice

Identify the letter of the choice that best matches the phrase or definition.
-To prevent unauthorized users from accessing files and computers, many routers are protected by these.

A) broadcast radio
B) cellular radio
C) 2G
D) 3G
E) 4G
F) physical
G) wireless
H) coaxial
I) infrared
J) twisted-pair
K) Bluetooth
L) UWB
M) WiMAX
N) P2P
O) NFC
P) fiber-optic
Q) latency
R) firewalls
S) RFID
T) dedicated