1
Q
1. You need a network that provides centralized authentication for your users. Which of the following logical topologies should you use? A. VLANs B. Peer-to-peer C. Client-server D. Mesh
A
- C. A client-server logical topology allows you to have a centralized database of users so that authentication is provided in one place.
2
Q
2. You need a topology that is scalable to use in your network. Which of the following will you install? A. Bus B. Ring C. Star D. Mesh
A
- 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 network today.
3
Q
3. Which of the following physical topologies has the most connections and is the least popular for LANs? A. Bus B. Start C. Ring D. Mesh
A
- D. 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.
4
Q
- In a physical star topology, what happens when a workstation loses its physical connection to another device?
A. The ring is broken, so no devices can communicate.
B. Only that workstation loses its ability to communicate.
C. That workstation and the device it’s connected to lose communication with the rest of the network.
D. No devices can communicate because there are now two unterminated network segments.
A
- B. 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.
5
Q
5. Which type of WAN technology uses labels, which enables priority of voice though the network? A. VPN B. T1 C. MPLS D. LAN E. Bus
A
- C. MultiProtocol Label Switching has many advantages as a LAN protocol. When labels are used, voice can have priority over basic data, for example.
6
Q
6. What is a logical grouping of network users and resources called? A. WAN B. LAN C. MPLS D. Host
A
- B. A logical grouping of hosts is called a LAN, and you typically group them by connecting them to a switch.
7
Q
- Which of the following is a concern when using peer-to-peer networks?
A. Where to place the server
B. Whose computer is least busy and can act as the server
C. The security associated with such a network
D. Having enough peers to support creating such a network
A
- C. It is easy to relax about security 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.
8
Q
- Which of the following is an example of when a point-to-multipoint network is called for?
A. When a centralized office needs to communicate with many branch offices
B. When a full mesh of WAN links is in place
C. When multiple offices are daisy-chained to one another in a line
D. When there are only two nodes in the network to be connected
A
- 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.
9
Q
- Which of the following is an example of a LAN?
A. Ten buildings interconnected by Ethernet connections over fiber-optic cabling
B. Ten routers interconnected by Frame Relay circuits
C. Two routers interconnected with a T1 circuit
D. A computer connected to another computer so they can share resources
A
- D. LANs generally have a geographic scope of a single building or smaller. They can range from simple (two hosts) to complex (with thousands of hosts).
10
Q
- Which of the following is a disadvantage of the star topology?
A. When a port on the central concentrating device fails, the attached end device and entire network loses connectivity to the rest of the network.
B. When the central concentrating device experiences a complete failure, all attached devices lose connectivity to the rest of the network.
C. In a star topology, a more expensive type of host must be used compared to the host used when implementing a physical bus.
D. It is more difficult to add stations and troubleshoot than with other topologies.
A
- 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.
11
Q
- What is a difference between a LAN and a WAN?
A. WANs need a special type of router port.
B. WANs cover larger geographical areas.
C. WANs can utilize either private or public data transport.
D. All of the above.
A
- D. A typical WAN connects two or more remote LANs together using someone else’s network (your ISP’s) and a router. Your local host and router see these networks as remote networks and not as local networks or local resources. Routers use proprietary serial connections for WANs.
12
Q
12. Which of the following provides the most physical layout flexibility in a very large, geographically dispersed enterprise network? A. Bus topology B. LAN switch C. Star topology D. MPLS cloud network
A
- D. MultiProtocol Label Switching provides logical links between sites, so branch offices can be easily and quickly added.
13
Q
13. In what type of network are all computers considered equals and they do not share any central authority? A. Peer-to-peer B. Client-server C. Physical topology D. None of the above
A
- 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.
14
Q
14. What advantage does the client-server architecture have over peer-to-peer? A. Easier maintenance B. Greater organization C. Tighter security D. All of the above
A
- 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).
15
Q
15. Which of the following is an example of a hybrid network? A. Ethernet switch B. Ring topology C. Bus topology D. Star topology
A
- A. The best answer to this question is an Ethernet switch, which uses a star physical topology with a logical bus technology.
16
Q
16. You have a network with multiple devices and need to have a smaller broadcast domain while working with a single device. Which of the following is the best solution? A. Use static IP addresses. B. Add more hubs. C. Implement more switches. D. Install a router.
A
- D. Routers break up broadcast domains and are used to connect different networks together.
17
Q
17. Which type of topology has the greatest number of physical connections? A. Point-to-multipoint B. Star C. Point-to-point D. Mesh
A
- D. In the mesh topology, there is a path from every connection to every other one in the network. 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.
18
Q
18. What type of topology gives you a direct connection between two routers so that there is one communication path? A. Point-to-point B. Star C. Bus D. Straight
A
- 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.
19
Q
19. Which network topology is a combination of two or more types of physical or two or more types of logical topologies? A. Point-to-multipoint B. Hybrid C. Bus D. Star
A
- B. A hybrid topology is a combination of two or more types of physical or logical network topologies working together within the same network.
20
Q
20. When designing a network and deciding which type of network topology to use, which item(s) should be considered? (Select all that apply.) A. Cost B. Ease of installation C. Ease of maintenance D. Fault-tolerance requirements
A
- A, B, C, D. Each topology has its own set of pros and cons regarding implementation, so it’s important to ask the right questions and consider cost, ease of installation, maintenance, and fault tolerance.
