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NETW206 Ch 01
LAN Design
| Question | Answer |
|---|---|
| Access Layer | The access layer in the three-layer hierarchical network model describes the portion of the network where devices connect to the network and includes controls for allowing devices to communicate on the network. |
| Convergence | The speed and capability of a group of switches running STP (Spanning Tree Protocol) to agree on a loop-free Layer 2 topology for a switched LAN. |
| Core Layer | The backbone of a switched LAN. All traffic to and from peripheral networks must pass through the core layer. It includes high-speed switching devices that can handle relatively large amounts of traffic. |
| Distribution Layer | In the 3 layer hierarchical network design model, the distribution layer is the layer that invokes policy and routing control. Typically, VLANs are defined at this layer. |
| Enterprise Network | A large and diverse network connecting major sites within a company or other organization. An enterprise network differs from a WAN in that it is privately owned and maintained. |
| Maintainability | A measure of the lack of difficulty in keeping network devices and associated software in working order. |
| Manageability | A measure of the lack of difficulty in managing network devices and using network management software and protocols. |
| Multilayer Switch | A device that filters and forwards packets based on OSI Layer 2 through Layer 7 information at wire-speed by utilizing dedicated hardware that stores data structures mirroring table, ARP table, and ACL information. |
| Performance | A loosely defined networking measure based on throughput and error rates. |
| Power over Ethernet (PoE) | The powering of network devices over Ethernet cable. IEEE 802.3af and Cisco specify two different PoE methods. Cisco power sourcing equipment (PSE) and powered devices (PDs) support both PoE methods. |
| Private Branch Exchange (PBX) | A digital or analog telephone switchboard located on the subscriber premises and used to connect private and public telephone networks. |
| Quality of Service (QoS) | A measure of performance for a transmission system that reflects its transmission quality and service available. |
| Redundancy | The duplication of devices, services, or connections so that, in the event of a failure, the redundant devices, services, or connections can perform the work of those that failed. |
| Scalability | A desirable property of a network to handle growing amounts of traffic in a graceful manner. A scalable network is readily enlarged. |
| Security | An encompassing term describing the prevention and means of prevention of unauthorized access to an entity, location, or system. |
| Voice over IP (VoIP) | Voice traffic over an IP-based network with POTS-like functionality, reliability, and voice quality. VoIP enables a router to carry voice traffic over an IP network. Voice packets are transported using IP in compliance with ITU-T specification H.323 |
| List 3 potential benefits of a converged network. | Combines voice & data network staffs, Combine voice, video, and applications in one computer, Simplified network changes. |
| List 4 options that describe data store and data server analysis. | Amount of server-to-server traffic, Amount of traffic for a SAN, Data backed up to tape, & Network attached storage. |
| Give a factor that may complicate user community analysis. | Application usage is not always bound by department or physical location. |
| What would be the port capacity of a single port on a 48 port Gigabit Ethernet switch? | 1 Gbps or 1000Mps |
| A switch that uses MAC addresses to forward frames operates at which layer of the OSI model? | Layer 2 |
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AZ4ME
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