Chapter 1: Intro to Scaling Networks
Introduction to Scaling Networks (Cisco III)
Terms in this set (42)
A design methodology for building networks in three layers including access, distribution, and core.
Cisco Enterprise Architecture
Divides the network into functional components while still maintaining the core, distribution, and access layers of the three-layer model.
A large and diverse network connecting most major points in a company or other organization. Differs from a WAN in that it is privately owned and maintained.
In terms of design, the ability of a network to be up most of the time. Sometimes referred to as 99.999, or "five nines".
The access layer in the three-layer hierarchical network model that describes the portion of the network where devices connect to the network and includes controls for allowing devices to communicate on the network.
In the three-layer hierarchical network design model, the distribution layer is the layer that invokes policy and routing control. Typically, VLANs are defined at this 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.
In the Cisco Enterprise Architecture, this module consists of the entire campus infrastructure, to include the access, distribution, and core layers.
The number of interfaces supported on a switch.
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.
Server Farm and Data Center Module
In the Cisco Enterprise Architecture, this module provides high-speed connectivity and protection for servers. It is critical to provide security, redundancy, and fault tolerance.
In the Cisco Enterprise Architecture, this module provides access to all services, such as IP telephony services, wireless controller services, and unified services.
In the Cisco Enterprise Architecture, this module consists of the Internet, VPN, and WAN modules connecting the enterprise with the service provider's network.
Service Provider Edge
In the Cisco Enterprise Architecture, this module provides Internet, Public Switched Telephone Network (PSTN), and WAN services.
An area of a network that is impacted when a critical device or network service experiences problems.
Characterized by its ability to build a routing table, support a few routing protocols, and forward IP packets at a rate close to that of Layer 2 forwarding.
The ability to integrate multiple devices to act as one device to simplify management and configuration.
A feature in which up to eight parallel Ethernet segments between the same two devices, each using the same speed, can be combined to act as a single link for forwarding and Spanning Tree Protocol logic.
A protocol defined by IEEE standard 802.1D. Allows switches and bridges to create a redundant LAN, with the protocol dynamically causing some ports to block traffic so that the bridge/ switch forwarding logic will not cause frames to loop indefinitely around the LAN. SSID See service set identifier.
A method of implementing multiple links between equipment to increase bandwidth.
The capability of a networking device to distribute traffic over some of its network ports on the path to the destination. Load balancing increases the utilization of network segments, thus increasing effective network bandwidth.
wireless access point
A device that connects wireless communication devices to form a wireless network, analogous to a hub connecting wired devices to form a LAN . This device usually connects to a wired network and can relay data between wireless devices and wired devices.
link-state routing protocol
A routing protocol classification where each router has a topology database based on an SPF tree through the network, with knowledge of all nodes. OSPF and IS-IS are examples of link-state routing protocols.
A scalable, link-state routing protocol used by many networks inside companies.
An OSPF configuration that only uses one area, the backbone area 0.
A method for scaling an OSPF implementation. As an OSPF network is expanded, other, nonbackbone areas can be created.
An advanced version of IGRP developed by Cisco. Provides superior convergence properties and operating efficiency, and combines the advantages of link-state protocols with those of distance vector protocols.
distance vector routing protocol
A type of routing protocol where a router's routing table is based on hop-by-hop metrics and is only aware of the topology from a viewpoint of its directly connected neighbors.
A component that depends on a certain routed protocol. For example, protocol-dependent modules in EIGRP allow it to work with various routed protocols . PDMs allow EIGRP to keep a topology table for each routed protocol such as IP, IPX RIP, AppleTalk Routing Table Maintenance Protocol (RTMP), and IGRP.
A device with a set number of interfaces.
A device that uses a module design that allows for upgrading the device with different or possibly newer interface configurations.
Devices that are capable of being connected to other like devices to provide higher port density.
Define the processing capabilities of a switch by rating how much data the switch can process per second.
The data rate that an Ethernet port on a switch is capable of attaining.
Power over Ethernet
Allows the switch to deliver power to a device over the existing Ethernet cabling. This feature can be used by IP phones and some wireless access points.
application-specific integrated circuit
A development process for implementing integrated circuit designs that are specific to the intended application, as opposed to designs for general-purpose use.
A router platform that optimizes branch services while delivering an optimal application experience across branch and WAN infrastructures.
network edge router
Delivers high-performance, highly secure, and reliable services that unite campus, data center, and branch networks.
service provider router
Responsible for differentiating the service portfolio and increasing revenues by delivering end-to-end scalable solutions and subscriber-aware services.
Cisco operating system software that provides the majority of a router's or switch's features, with the hardware providing the remaining features.
To monitor and make configuration changes to a network device over a network connection using Telnet, SSH, or HTTP access.
Used for initial configuration of a device or when network access is unavailable. Requires direct connection to the console or AUX port and terminal emulation software.