1. B, D.
Physical star and physical extended-star are the most popular physical LAN networks today.
FDDI and Token Ring are no longer used, but they used a physical ring topology.
Only a mesh physical topology has point-to-point connections to every device, so it has more connections, and is not a popular LAN technology.
In a star topology, each workstation connects to a hub, switch, or similar central device, but not to other workstations. The benefit is that when connectivity to the central device is lost, the rest of the network lives on.
In Chapter 3, we’ll cover Ethernet and the standards, but you need to know that the original Ethernet used a classical CSMA/CD as its physical and logical topology.
A logical grouping of hosts is called a LAN, and they are typically grouped by connecting them to a switch.
Security is easy to relax in a peer-to-peer environment. Because of the trouble it takes to standardize authentication, a piecemeal approach involving users’ personal preferences develops. There are no dedicated servers in a peer-to-peer network, and such a network can be created with as few as two computers.
When a central office, such as a headquarters, needs to communicate directly with its branch offices, but the branches do not require direct communication with one another, the point-to-multipoint model is applicable. The other ...