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The Internet Protocol Suite has 4 layers: Application Layer has network utilities like Ping and Traceroute. "HTTP functions as a request-response protocol in the client-server computing model. In HTTP, a web browser, for example, acts as a client, while an application running on a computer hosting a web site functions as a server. The client submits an HTTP request message to the server. The server, which stores content, or provides resources, such as HTML files and images," The "Transport Layer provides end-to-end communication services ... such as connection-oriented data stream support, reliability, flow control, and multiplexing." TCP divides data into packets, numbers, and arrange packets.
The Internet Layer uses "internetworking, which is the concept of connecting multiple networks with each other through gateways." IP delivers "packets from the source host to the destination host solely based on their addresses."
The Link Layer "is the physical and logical network components used to interconnect hosts or nodes in the network"
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Suffolk.edu has IP address of 192.138.214.160 
, is hosted by Suffolk University on the server that is located in Boston, United States. The domain has nameservers: auth1.dns.cogentco.com auth2.dns.cogentco.com dnsauth1.suffolk.edu .
Suffolk uses cogentco.com for some servers. Here isthe description of the network of cogento.com and a map of their network:
"Cogent's end-to-end optical network consists of multiple metropolitan IP-over-WDM fiber rings located in Cogent's major markets throughout the United States and Europe. Cogent currently has a presence in over 145 markets throughout North America and Europe. Cogent's network provides each building or data center with up to 80 Gbit/s of dedicated bandwidth. Layer 3 edge routers in each building are connected to Cisco Layer 3 Terabit core routers over two diverse optical paths. These core routers are tied together via an international backbone network consisting of multiple 10 Gbit/s DWDM optical links. With a currently implemented capacity of up to 520 Gbit/s, Cogent's international IP network is the largest in the world and is scalable to a total capacity of over one Terabit per second."
