ISM 4220 Chapter 8 (100% Correct) 2024.

Internetworking deals with which layer standards? correct answers Governed by Layer 3 and Layer 4 standards (Internet and Transport) We only look at ____ and ____ internetworking correct answers TCP and IP - Because TCP and IP dominates the work of network professionals at the internet and transport layers - Real world routers cannot limit themselves to TCP/IP internetworking. Commercial routers are multiprotocol routers which can route not only IP packets but also IPX packets, SNA packets, AppleTalk packets, and other minor types of packets IP routing correct answers - Routers make decisions about forwarding packets, which interface to send an arriving packet back out to get it closer to its destination. - For routers, ports are called interfaces - Router forwarding is much more complex than the Ethernet switching. This higher complexity requires routers to do more work per arriving packet than switches do per arriving frame - Consequently, routers are more expensive than switches for a given volume of traffic - Common network adage: "Switch where you can, route where you must." Router ports are called? correct answers Interfaces Hierarchical IPv4 Addressing correct answers - IPv4 addresses are 32 bits long - However, IPv4 addresses are not simple 32-bit strings. They have internal structure, and this internal structure is important in routing Hierarchical IPv4 Addressing: Single Networks VS Networks on the Internet correct answers - To understand IPv4 addressing, you must understand what the term 'network' means on the internet. - It does not mean a single network, like an Ethernet network. - Rather a network on the Internet is a collection of routers and data links owned by a recognized organization. Your home network is not a recognized network. The University of Hawaii's network is a recognized organization. So is A. - Both ^^ are end-user organizations. - Internet Service Providers (ISPs) are also recognized organizations. - ISPs are not end user organizations Notes on Network on the Internet correct answers - On the internet, 'network' does not mean single network like an Ethernet LAN - Rather, network is an organizational concept - It means the routers and switches and data links are owned by a recognized organization, which is an end-user organization or an ISP Hierarchical Addressing correct answers - IPv4 addresses are hierarchical