🔍 Key Concepts

• LAN (Local Area Network) connections between a PC and a terminal • The standard protocol suite used for most Ethernet and Internet networking • Difference between an application protocol (like email or file transfer) and a network/transport protocol

💭 Think About

• Which of these choices is the general-purpose network protocol used for most local networks and the Internet, not just for a single application? • Which options are used mainly for a specific type of service, like sending email or transferring files, instead of handling all kinds of data on a LAN? • If you plug a PC into a shipboard LAN, what protocol stack does the PC normally use to communicate with other devices?

✅ Before You Answer

• Identify which answer is a network/transport layer protocol suite rather than an application-specific protocol • Eliminate protocols that are mainly associated with email or file transfers only • Think about what protocol your PC uses when connected to a typical Ethernet LAN or the Internet