300-320 · Question #705
A customer has several remote sites connected with the HQ via microwave links. An engineer has been asked to propose a backup WAN connectivity for these sites with these requirements: Physical WAN…
The correct answer is A. LTE. LTE (Long-Term Evolution / 4G cellular) best satisfies all the stated requirements. It requires no physical infrastructure at the site (just an LTE router/modem), making it viable where physical WAN is unavailable. It is low-cost compared to leased lines, and deployment is fast…
Question
A customer has several remote sites connected with the HQ via microwave links. An engineer has been asked to propose a backup WAN connectivity for these sites with these requirements:
Physical WAN connectivity is not available for most of these sites. A low-cost and fast-to- implement backup solution must be deployed. Bandwidth needs for the backup link are low. Users can tolerate a WAN outage of up to 2 hours. Which backup WAN link type does the engineer recommend?
Options
- ALTE
- B802.16 WiMAX
- Claser link
- D802.15.1 Bluetooth
How the community answered
(30 responses)- A83% (25)
- B3% (1)
- C3% (1)
- D10% (3)
Explanation
LTE (Long-Term Evolution / 4G cellular) best satisfies all the stated requirements. It requires no physical infrastructure at the site (just an LTE router/modem), making it viable where physical WAN is unavailable. It is low-cost compared to leased lines, and deployment is fast - simply plug in an LTE device and configure the router. LTE bandwidth is sufficient for low-demand backup scenarios. Option B (802.16 WiMAX) is a viable wireless broadband technology but has very limited deployment globally and is not commonly available. Option C (laser link) requires line-of-sight, expensive equipment, and precise alignment, making it neither low-cost nor fast to deploy. Option D (802.15.1 Bluetooth) has a maximum range of approximately 10 meters, making it completely unsuitable for WAN connectivity.
Topics
Community Discussion
No community discussion yet for this question.