cisco network academy ccna exploration download

... Cisco Networking Academy CCNA Curricula US & Canada Webinar CCNA Discovery and CCNA Exploration Susan Weatherly, Area Academy Manager Karen Alderson, Technical Manager May 2008 CCNA rev ... Regional Academy CCNA rev © 2007 Cisco Systems, Inc All rights reserved Cisco Public 33 Q and A CCNA rev © 2007 Cisco Systems, Inc All rights reserved Cisco Public 34 CCNA rev © 2007 Cisco Systems, ... Experience, and Certification CCNA rev © 2007 Cisco Systems, Inc All rights reserved Cisco Public CCNA Exploration: Flexibility in Course Sequence Network Fundamentals Network Fundamentals Routing

Ngày tải lên: 15/05/2018, 15:49

... browsers display file-download speeds in kilobytes per second This means that with a 45-kbps connec-tion, the download speed would be a maximum of 5.76 kBps In practice, this download speed ... data transferred over a network connection ■ kBps (kilobytes per second)—One thousand bytes per second This is a standard measurement of the amount of data transferred over a network connection Table ... over a network connection Basic Ethernet operates at 10 Mbps ■ MBps (megabytes per second)—One million bytes per second This is a standard measurement of the amount of data transferred over a network

Ngày tải lên: 04/07/2014, 18:20

... network securely. Remote Office with Cisco Router Regional Office with Cisco PIX Firewall POP Corporate Business Partner with Cisco Router SOHO with Cisco ISDN/DSL Router Mobile Worker with Cisco ... Storage-Area Networks (SANs) A storage-area network (SAN) is a dedicated, high-performance network that moves data between servers and storage resources. Because it is a separate dedicated network, ... Long-Haul Network POP 1 Customer Premises POP 2 Customer Premises Access Network Metropolitan-Area Network SAN Site Colocation Site 1102.book Page 53 Tuesday, May 20, 2003 2:53 PM 54 Chapter 2: Networking

Ngày tải lên: 04/07/2014, 18:20

... throughput: ■ Internetworking devices ■ Type of data being transferred ■ Network topology ■ Number of users on the network ■ User’s computer ■ Server computer ■ Power conditions ■ Congestion A network’s ... administrator will be aware of changes in network performance and changes in the needs of network users The network can then be adjusted accordingly Data Transfer Calculation Network designers and administrators ... bandwidth is an important consideration in network design, because network bandwidth is never greater than the limits imposed by the chosen medium and networking technologies Figure 2-15 lists

Ngày tải lên: 04/07/2014, 18:20

... and size of networks. As compa- nies realized the money they could save and the productivity they could gain by using networking technology, they added networks and expanded existing networks almost ... computer on a network, even if the sender and receiver have different types of network media. The OSI reference model has seven numbered layers, each of which illustrates a partic- ular network function: ... 4—Transport layer ■ Layer 3—Network layer ■ Layer 2—Data link layer ■ Layer 1—Physical layer This separation of networking functions is called layering. Dividing the network into seven layers

Ngày tải lên: 04/07/2014, 18:20

... devices can exist without a network, but without a network, host capabilities are greatly reduced Host devices are physically connected to the network media using a network interface card (NIC) ... the entire network (Network topology is discussed later in this chapter.) Hubs are considered Layer 1 devices because they only regenerate the signal and repeat it out all their ports (network connections) ... is accomplished To filter or selectively deliver network traffic, bridges build tables of all MAC addresses located on a network segment and other networks and then map them to associated ports

Ngày tải lên: 04/07/2014, 18:20

... connectivity between Ethernet networks. Any Cisco AP can be used as a repeater (extension point) for the wireless network. Figure 2-38 Wireless Bridge Network Topologies A network topology defines ... or leave certain networks. Figure 2-33 shows a Cisco PIX Firewall 535 series, which is a dedicated network device. 1102.book Page 89 Tuesday, May 20, 2003 2:53 PM 90 Chapter 2: Networking Fundamentals ... hardware component of a network. A firewall protects a private network’s resources from users in other networks. Working closely with a router program, a firewall examines each network packet to determine

Ngày tải lên: 04/07/2014, 18:20

... host in the network is connected to the central device with its own cable When a star network is expanded to include additional networking devices that are connected to the main networking device, ... protocol header extended-star topology A network in which a star network is expanded to include an additional networking device that is connected to the main networking device extranet Intranet-based ... address that uniquely identifies each node of a network This address controls data communication for the host on the network metropolitan-area network (MAN) A network that spans a metropolitan area

Ngày tải lên: 04/07/2014, 18:20

... the network layers? A. 1: Physical 2: Data link 3: Transport 4: Network 5: Presentation 6: Session 7: Application Trang 2110 Chapter 2: Networking FundamentalsB. 1: Physical 2: Data link 3: Network ... travels through networks B. A model that describes how data makes its way from one application program to another throughout a network C. A conceptual framework that specifies which network functions ... Presentation 7: Application C. 1: Physical 2: Data link 3: Network 4: Session 5: Transport 6: Application 7: Presentation D. 1: Physical 2: Network 3: Session 4: Data link 5: Transport 6: Application

Ngày tải lên: 04/07/2014, 18:20

... 100 Mbps. Used in Fast Ethernet networks. ■ Category 5e (CAT 5e)—Used in networks running at speeds up to 1000 Mbps (1 Gbps). Used in Gigabit Ethernet (GigE) networks. ■ Category 6 (CAT 6)—The ... on two types of copper cable used for networks: ■ Twisted-pair—Twisted-pair cables are composed of one or more pairs of copper wires. Most data and voice networks use twisted-pair cabling. ■ ... 2:53 PM 124 Chapter 3: Networking Media Twisted-Pair Cable Twisted-pair cable is a type of cabling that is used for telephone communications and most modern Ethernet networks. A pair of wires

Ngày tải lên: 04/07/2014, 18:20

... despite its advantages, coaxial cable is no longer commonly used in Ethernet networks. Although many bus topology networks still utilize coaxial cable in use throughout the world, the IEEE no ... outlined LAN cabling specifications. IEEE 802.3 is a standard for Ethernet networks, and IEEE 802.5 is a Token Ring network standard. The Underwriters Laboratories issues standards that are ... outlet: ■ A telephone cable for voice ■ A network cable for data The voice cable must be a 2-pair UTP cable with its correct connectors, or terminators. The network cable must be one of the following

Ngày tải lên: 04/07/2014, 18:20

... connectors, and fibers that are always required on an optical network, you can sometimes see several other devices on an optical fiber network Repeaters are optical amplifiers that receive attenuating ... Many characteristics of fiber-optic media are superior to copper Every fiber-optic cable used for networking consists of two glass fibers encased in sep-arate sheaths One fiber carries transmitted ... as the light source, often within LANs or distances of a couple hundred meters within a campus network Single-Mode Polymeric Coating Glass Cladding 125 Microns d/a Glass Core = 5.8 Microns Requires

Ngày tải lên: 04/07/2014, 18:20

... 20, 2003 2:53 PM 158 Chapter 3: Networking Media ■ 5 GHz—Recently, the FCC opened up the 5-GHz band for unlicensed use by high-speed data communications devices. Cisco has acquired 5-GHz technology ... reliable range of up to 25 miles. The Cisco Aironet 340 Wireless LAN Series can deliver 11-Mbps throughput because it operates in the 2.4-GHz frequency. Cisco has acquired 5-GHz technology and ... signal travels through a fiber, 1102.book Page 149 Tuesday, May 20, 2003 2:53 PM 150 Chapter 3: Networking Media the more it loses strength. This attenuation of the signal is due to several factors

Ngày tải lên: 04/07/2014, 18:20

... technology ensures that deployed networks are interoperable and in compliance Just as in cabled networks, IEEE is the prime issuer of standards for wireless networks The standards have been created ... high-speed transfers of cabled networks nor the security and uptime reli-ability, the flexibility justifies the trade off When considering the installation of a network in an existing facility, ... com-patibility is extremely important because it allows upgrading of the wireless network without replacing the network interface cards (NICs) or access points IEEE 802.11b devices achieve the

Ngày tải lên: 04/07/2014, 18:20

... corporate network is allowed Mutual authentication protects enterprises from unauthorized APs serving as a potential entrance into the network LEAP is the type of authentication pri-marily used on Cisco ... little as 1 watt into the RF spectrum can cause major network disrup-tion Wireless phones operating in the 2.4-GHz spectrum can also cause network degradation ■ Weather—Generally, the RF signal ... an omnidirectional antenna Trang 2170 Chapter 3: Networking MediaFigure 3-50 Omnidirectional Antenna Wireless Security The exponential growth of networking, including wireless technologies, has

Ngày tải lên: 04/07/2014, 18:20

... the network will be too high for the LAN or WAN connections to be useful Networking media is literally and physically the backbone of a network Inferior quality network cabling results in network ... Inferior quality network cabling results in network failures and in networks with unreliable performance All three categories of networking media (copper-based, optical fiber, and wireless) require ... wireless networking media involves certain electrical and mathematical concepts and terms, such as signal, wave, frequency, and noise Understanding this vocabulary is helpful when learning about networking,

Ngày tải lên: 04/07/2014, 18:20

... atmosphere, or space, as the medium), networking media confines network signals to a wire, cable, or fiber Networking media are considered Layer 1 components of LANs Computer networks can be built with many ... the network As noted in Table 4-2, 10-Mbps Ether-net typically is implemented at the end-user level to connect to desktops, and faster technologies are used to interconnect to servers and network ... ports can make this prohibitive Before making this decision, you must determine network requirements For example, a network running at traditional Ethernet speeds of 10 Mbps can be easily overwhelmed

Ngày tải lên: 04/07/2014, 18:20

... length for UTP cable in a network is 100 meters (approximately 333 feet). If you have to expand the network beyond that limit, you need to add a repeater. In most Ethernet networks this repeater ... shows a GBIC, and Figure 4-22 shows a Cisco WS-X2931 Gigabit Ethernet Module with the GBIC out. Figure 4-21 Gigabit Interface Converter (GBIC) Figure 4-22 Cisco WS-X2931 Gigabit Ethernet Module ... 4-30, is to regenerate and retime network signals at the bit level to allow them to travel a longer distance on the media. Repeaters are commonly used if too many network nodes exist or the number

Ngày tải lên: 04/07/2014, 18:20

... Best Practices* Ideas to help you when implementing Best Practices in the Cisco Network Academy Program These rubrics provide a standard for learners. ... that can cause a PING to fail (Sem 2) • You are troubleshooting the 5-router network. Distinguish between observable network symptoms and what problems you might infer are causing those symptoms. ... • Demonstrates the connections between and among the various components of networking • Shows knowledge of basic networking vocabulary • Demonstrates the ability to construct simple materials,...

Ngày tải lên: 21/12/2013, 05:16

... into Networks • Reasons for grouping devices into sub-networks and define several terms used to identify the sub-networks – Geographic Học viện mạng Bách khoa - Website: www.bkacad.com 27 Network ... destination within a network or on another network with minimum overhead. • Reasons for grouping devices into sub-networks and define several terms used to identify the sub-networks – Ownership Grouping ... www.bkacad.com 39 Network Layer Protocols and Internet Protocol (IP) Học viện mạng Bách khoa - Website: www.bkacad.com 3 • Define the basic role of the Network Layer in data networks • The protocols...

Ngày tải lên: 22/12/2013, 13:17