Enlisted Information Warfare Specialist (EIWS) Common Core Practice Test

When an enterprise has many sites with no single central location, inter-site traffic needs a backbone that does the routing across diverse locations. The WAN service the enterprise subscribes to provides this core routing function by delivering the connectivity, backhaul, and routing between sites (often using MPLS VPN or other VPN technologies). This setup lets traffic flow efficiently from one site to another through the provider’s network, with edge routers and necessary routing policies managed by the WAN service. Local switches in each building stay at Layer 2 to move devices within a site, not between sites. A dedicated firewall appliance sits at the network edge to enforce security, not to route traffic across the entire distributed network. DNS resolves domain names to IPs and does not handle the routing of packets between sites.