CCNA Routing_Switching (1)

Interpret network documentation.
- Describe the equipment in the enterprise Network Operations Center.
Explain the importance of the enterprise edge in the provisioning of services.
At the outer edge of the enterprise network is the Pointof-Presence, or POP, which provides an entry point for services to the enterprise network. Externally-provided services coming in through the POP include Internet access, wide area connections, and telephone services (PSTN).
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2.2.3 Connecting the Enterprise Network to External Services
The network connection services commonly purchased by an enterprise include leased lines (T1/E1 or business class),
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2.1.3 Telecommunication Room Design and Considerations
The telecommunications room is referred to as a wiring closet or intermediate distribution facility (IDF). IDFs contain lower-speed switches, APs, and hubs. Many IDFs connect to a Main Distribution Facility (MDF) using an extended star design. MDFs house high-speed switches, routers, and server farms. The MDF is usually located in the NOC or centrally located within the building.
Network topology maps are frequently based on original floor plans. Blueprints can be marked up, or redlined, to show the changes. As-built diagram documents changes from original plans.
Equipment in the enterprise NOC is usually mounted in racks. Switches need to be positioned near patch panels and close to where the cabling is gathered into cable trays.
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2.3.2 Basic Router CLI Show Commands
The most commonly used IOS commands to display and verify the operational status of the router and related network functionality.
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2.1 Describing the Current Network
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2.1.1 Enterprise Network Documentation
Network infrastructure diagrams
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2.2 Supporting the Enterprise Edge
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2.2.1 Service Delivery at the Point-ofPresence
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2.1.2 Network Operations Center (NOC)
Documentation of the cable plan and testing are critical to network operations.
思科网络技术学院onsiderations at the Enterprise Edge
The edge is the point of entry for outside attacks and is a point of vulnerability. All traffic in or out of the organization goes through the edge.
- All cables should be labeled at both ends, using a standard convention that indicates source and destination. - All cable runs should be documented on the physical network topology diagram. - All cable runs, both copper and fiber, should be tested end-toend by sending a signal down the cable and measuring loss.
Exploring the Enterprise Network Infrastructure
Introducing Routing and Switching in the Enterprise – Chapter 2
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Objectives
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2.1.1 Enterprise Network Documentation
Several important types of documentations are used in the enterprise network.
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2.1.3 Telecommunication Room Design and Considerations
MDF and IDFs in the campus diagram
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2.1.2 Network Operations Center (NOC)
Most enterprise networks have a Network Operations Center (NOC) that allows for central management and monitoring of all network resources.
- Describe the Point-of-Presence for service delivery. - Identify security considerations and equipment at the enterprise edge.
Identify router and switch hardware characteristics and use router CLI configuration and verification commands.
- Physical topology map - Logical topology map
Control plane information: failure domains
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2.1.1 Enterprise Network Documentation
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2.1.3 Telecommunication Room Design and Considerations
Provide power to end-user devices directly from the Ethernet switches in the telecommunications room. End-user devices are powered using the IEEE 802.3af standard, Power over Ethernet, or PoE. PoE provides power to a device over the same twisted pair cable that carries data.
- Raised floors - High performance UPS and HVAC - Fire suppression systems - Network monitoring equipment - MDF switches and routers
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2.1.2 Network Operations Center (NOC)
NOC also provide centralized resources such as servers and data storage.