Network+ Graded Lab_1

Which of the following applies to client/server network? (Choose two) A. Diagram of a File Server connected to clients and networked printers via a switch B. Client/server networks can have better performance than a peer-to-peer network because their resources can be located on dedicated servers rather than on a PC running a variety of end-user applications. C. Administration of client/server is more difficult than in a peer-to-peer network because the resources are located on one or more servers. D. Client/server networks are not commonly used by businesses.

A. Diagram of a File Server connected to clients and networked printers via a switch B. Client/server networks can have better performance than a peer-to-peer network because their resources can be located on dedicated servers rather than on a PC running a variety of end-user applications.

Functions of a Network A. File sharing between two computers B. Instant Messaging C. Surfing the web D. Video chatting between computers located globaly E. Handles system resources F. Provides a user interface

A. File sharing between two computers B. Instant Messaging C. Surfing the web D. Video chatting between computers located globaly

Hub and Spoke WAN Topology Benefits Communication between two remote sites travels through the hub site

Adding one or more additional sites is easy because only one link needs to be added per site.

What topology was used in an early LAN technology that used the passing of a token to transmit? A. Dual ring B. Ring C. Star D. Bus

B. Ring

Hub and Spoke WAN Topology Drawbacks

Because each remote site is reachable by only a single WAN link, the hub and spoke topology lack redundancy.

Partial Mesh Topology Benefits/Drawbacks Selected sites are interconnected via direct links, whereas sites that have less frequent communication can communicate via another site

Benefit: A partial mesh topology provides optimal routes between selected sites with higher intersite traffic volumes, while avoiding the expense of interconnecting every site to every other site. Drawbacks: A partial mesh topology is ledd fault tolerance than a full mesh topology.

Star Topology Benefits/Drawbacks Devices have independent connections back to a central device

Benefits: A cable break only impacts the device connected via the broken cable, and not the entire topology. Drawbacks: More cable is required for a star topology, as opposed to bus or ring topologies because each device requires its own cable to connect back to the central device.

Ring Topology Benefits/Drawbacks Devices are interconnected by connecting to a single ring or, in some cases(for example, FDDI), a dual ring

Benefits: A dual ring topology adds a layer of fault tolerance. If a cable break occurred, connectivity to all devices could be restored. Drawbacks: A break in a ring when a single ring topology is used results in a network outage for all devices connected to the ring.

Full Mesh Benefits/Drawbacks The number of required WAN connections can be calculated with the formula w=n*(n-1)/2 Where w = the number of WAN links n= the number of sites Example: a network with 10 sites would require 45 WAN connections to form a fully meshed network. 45 = 10 * (10-1) / 2

Benefits: A full mesh network is fault tolerant because one or more links can be lost and reachability between all sites might still be maintained.

Partial Mesh Topology Benefits/Drawbacks A partial mesh topology uses fewer links than a full mesh topology and more links than a hub and spoke topology for interconnecting the same number of sites

Benefits: A partial mesh topology is more redundant than a hub and spoke topology. Drawbacks: A partial mesh topology is more expensive than a hub and spoke topology.

Client / Server Benefits/Drawbacks Resource sharing is made possible via dedicated server hardware and network operating systems

Benefits: Administration is simplified, because parameters, such as file sharing permissions and other security settings, can be administered on a server as opposed to multiple clients. Drawbacks: Client/Server networks can cost more that peer to peer networks.

Full Mesh Benefits/Drawbacks Every site has a direct WAN connection to every other site

Benefits: An optimal route exists between any two sites. Drawbacks: A full mesh network can be difficult and expensive to scale, because the addition of one new site requires a new WAN link between the new site and every other existing site.

Client / Server Benefits/Drawbacks Client devices share a common set of resources located on one or more dedicated servers

Benefits: Client/Server networks can easily scale, which might require the purchase of additional client licences. Drawbacks: Because multiple clients might rely on a single server for their resources, the single server can become a single point of failure in the network.

Bus Topology Drawbacks The cable requires a terminator at each end of the cable to maintain appropriate electrical characteristics of the cable

Benefits: Depending on the media used by the bus, a bus topology can be less expensive. Drawbacks: Because problem isolation might necessitate an inspection of multiple network taps to make sure they either have a device connected or they are properly terminated.

Bus Topology Drawbacks Bus topologies were popular in early Ethernet networks

Benefits: Installation of a network based on a bus topology is easier than some other topologies, which might require extra wiring to be installed. Drawbacks: Adding devices to a bus might cause an outage for other users on the bus.

Bus Topology Drawbacks One cable is used per network segment

Benefits: Less cable is required to install a bus topology, as compared with other topologies. Drawbacks: Because a single cable is used per network segment, the cable becomes a potential single point of failure.

Peer to Peer Benefits/Drawbacks Client devices share their resources with other client devices

Benefits: Peer to peer networks can be installed easily because resource sharing is made possible by the clients' operating systems, and knowledge of advanced NOSs is not required. Drawbacks: Scalability is limited because of the increased administration burden of managing multiple clients.

Peer to Peer Benefits/Drawbacks Resource sharing is made available through the clients' operating systems

Benefits: Peer to peer networks usually cost less than client/server networks because there is no requirement for dedicated server resources or advanced NOS software. Drawbacks: Performance might be less than that seen in a client/server network because the devices providing network resources might be performing other tasks not related to resource sharing.

Star Topology Benefits/Drawbacks Star topologies are commonly used with Ethernet technologies

Benefits: Troubleshooting is relatively simple because a central device in the star topology acts as the aggregation point of all the connected devices. Drawbacks: Installation can take longer for a star topology, as opposed to a bus or ring topology, because more cable runs that must be installed.

Ring Topology Benefits/Drawbacks Each device on a ring includes both a receiver(for the incoming cable) and a transmitter(for the out going cable)

Benefits: Troubleshooting is simplified in the event of a cable break, because each device on a ring contains a repeater. Drawbacks: Rings have scalability limitations. Specifically, a ring has a maximum number of attached stations. When exceeded a ring may need to be divided into two interconnected rings.

What is the name of the address that is used by a switch to identify specific devices? A. LLC B. ARP C. MAC D. IP

C. MAC

A Bluetooth connection between a mobile phone and a headset is an example of what type of network category? A. LAN B. MAN C. PAN D. CAN

C. PAN

Hub and Spoke WAN Topology Benefits Each remote site connects back to a main site via a WAN link

Costs are reduced because a minimal number of links are used.

Bus Topology Benefits/Drawbacks Network components tap directly into the cable via a connector such as a T connector or a vampire tap.

Drawbacks: An error condition existing on one device on the bus can impact performance of other devices on the bus. Drawbacks: A bus topology does not scale well because all devices share the bandwidth available on the bus. Also, if two devices on the bus simultaneously request access to the bus, an error condition results.

Ring Topology Benefits/Drawbacks Each device on the ring repeats the signal it receives

Drawbacks: Because a ring must be a complete loop, the amount of cable required for a ring is usually higher than the amount of cable required for a bus topology serving the same number of devices.

Hub and Spoke WAN Topology Drawbacks Each remote site connects back to a main site via a WAN link

Suboptimal routes must be used between remote sites because all intersite communication must travel via the main site.

Hub and Spoke WAN Topology Drawbacks Communication between two remote sites travels through the hub site

This hub sit potentially becomes a single point of failure because all remote sites converge on the main site.

Full Mesh Benefits/Drawbacks

Troubleshooting a full mesh network is relatively easy because each link is independent of the other links.