Wireless Communications Flashcards
6 cards from real Telecommunications practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Wireless Communications flashcards as text
What cellular generation introduced the concept of mobile data in the US?
Answer: 2G
2G (GSM/CDMA) introduced digital voice and basic data services like SMS and limited internet access.
What frequency range does 5G mmWave technology primarily use in the US?
Answer: 24 GHz – 40 GHz
5G mmWave (millimeter wave) uses frequencies between 24 GHz and 40 GHz, enabling extremely high speeds but limited range.
What is a femtocell used for in wireless networks?
Answer: Extend cellular coverage inside buildings
A femtocell is a small, low-power cellular base station used to extend indoor coverage using the internet as backhaul.
What does LTE stand for?
Answer: Long Term Evolution
LTE (Long Term Evolution) is the 4G standard for mobile broadband, offering download speeds up to 150 Mbps.
Which modulation scheme encodes data by varying signal phase?
Answer: PSK
PSK (Phase-Shift Keying) encodes data by shifting the phase of a carrier signal to represent different bit patterns.
What is the purpose of a wireless access point (WAP)?
Answer: Connect wireless devices to a wired network
A wireless access point bridges wireless clients to a wired Ethernet network, enabling Wi-Fi connectivity.