Which service helps network clients find a website using human readable hostnames?

• A. Traffic Mirroring
• B. Domain Name System (DNS)
• C. iBGP
• D. Load Balancer

Answer: (B)

The main idea here is how computers translate human-friendly names into the numeric addresses devices use on a network. The Domain Name System provides that translation: when you type a website like example.com, your device asks DNS to resolve that hostname to an IP address. DNS operates as a distributed, hierarchical database of name-to-address mappings, with your device or your network’s resolver querying up through root, TLD, and authoritative servers to obtain the correct IP. Once the IP is returned, your browser can connect to the server hosting the site.

Traffic mirroring duplicates traffic for analysis and has nothing to do with finding a host by name. iBGP is a routing protocol used inside an autonomous system for routing decisions between routers. A load balancer distributes traffic across servers but doesn’t perform name-to-address resolution itself. DNS is the service that lets you use human-readable hostnames to reach websites.