Which tier of Internet service providers provides transit services to other ISPs?
Which tier of Internet service providers provides transit services to other ISPs?
Tier 1 ISPs are at the top of the hierarchy and provide the backbone of the Internet, offering connectivity to various other networks without paying for transit. They provide transit services to both Tier 2 and lower-tier ISPs. Tier 2 ISPs, while connecting to Tier 1 ISPs, also offer transit services to smaller ISPs and end-users. Tier 3 ISPs primarily serve end-users and do not provide transit services to other ISPs. Therefore, the correct answer is Tier 1 and Tier 2 ISPs.
IMHO the answer B (Tier 1 and Tier 3 ISPs) is wrong. It should be Tier "1 and Tier 2 ISPs"
Answer is Tier1 and Tier-2
A is the correct answer.
Correct Answer is "A"