Chapter 1 (Network +)

C. Virtual private networks (VPNs) allow for the creation of private networks across the Internet. A VPN makes your local host part of the remote network by using the WAN link that connects you to the remote LAN.

D. In client-server networks, requests for resources go to a main server that responds by handling security and directing the client to the resource it wants, instead of the request going directly to the machine with the desired resource (as in peer-to-peer).

B. A hybrid topology is a combination of two or more types of physical or logical network topologies working together within the same network.

C. A client/server logical topology allows you to have a centralized database of users so that authentication is provided in one place.

A. 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 scenarios tend to indicate the use of a point-to-point link between sites.

A. In a peer-to-peer network, all computers are considered equals. It is up to the computer that has the resource being requested to perform a security check for access rights to its resources.

B. In a star topology, each workstation connects to a hub, switch, or similar central device, but not to other workstations. The benefit is when connectivity to the central device is lost, the rest of the network lives on.

C. 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.. 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.

A. As its name implies, in a point-to-point topology you have a direct connection between two routers, giving you one communication path. The routers in a point-to-point topology can either be linked by a serial cable, making it a physical network, or be far away and only connected by a circuit within a frame-relay network, making it a logical network.

A LAN (Local Area Network) is a network that connects devices within a limited geographical area, such as a home, office, or 1 building. The other options describe networks that span larger distances or use technologies that are not typically associated with LANs.  

D. If you have a switch, you can break up a layer-2 switched networks into smaller broad¬cast domains by creating VLAN's.

D. In the mesh topology, there is a path from every machine to every other one in the net¬work. A mesh topology is used mainly because of the robust fault tolerance it offers—if one connection goes on the blink, computers and other network devices can simply switch to one of the many redundant connections that are up and running.

D. A typical WAN connects two or more remote LANs together using someone else's net¬work (your ISP's) using a router. Your local host and router see these networks as remote networks and not as local networks or local resources.

B. The only disadvantage mentioned is the fact that there is a single point of failure in the network. However, this topology makes troubleshooting easier; if the entire network fails, you know where to look first. The central device also ensures that the loss of a single port and the addition of a new device to an available port do not disrupt the network for other stations attached to such a device.

C. VLANs allow you to be anywhere on the physical network and still be local to the net¬work resources you need.

A VPN (Virtual Private Network) provides a secure connection to another network over the internet. It encrypts data, ensuring privacy and security, which is essential for safely accessing an office computer remotely via remote desktop. VPNs protect against eavesdropping and unauthorized access.

D. Only a Mesh physical topology has point-to-point connections to every device, so it has the least likelihood of ever having a collision.

A. The best answer to this question is Ethernet, which uses a start physical topology with a logical bus technology.

A, B, C, D. Each topology has its own set of pros and cons regarding implementation, so asking the right questions and considering cost, ease of installation, maintenance, and fault tolerance are all important factors to be considered.

C. To install a physical topology that provides ease of scalability use a star network. This is a hub or switch device, and this is the most common LAN networks today.