cisco networking academy program ccna 1

... a larger center conductor of 18 AWG. RG-11 cable is heavier still with a center conductor of 14 AWG and is used to bring cable into neighborhoods. 1102.book Page 128 Tuesday, May 20, 2003 2:53 ... and continuity with the multimeter. 6V Lantern + 6V Lantern + 1102.book Page 121 Tuesday, May 20, 2003 2:53 PM 122 Chapter 3: Networking Media The top of Figure 3-4 illustrates the flashlight ... distances. A wire with an AWG size of 24 would be 1/24th of an inch in diameter. 1102.book Page 123 Tuesday, May 20, 2003 2:53 PM 124 Chapter 3: Networking Media Twisted-Pair Cable Twisted-pair

Ngày tải lên: 04/07/2014, 18:20

... terminators: ■ 150 ohm STP 2-pair cable (Token Ring LANs) ■ 100 ohm UTP 4-pair cable (Ethernet LANs) ■ 62.5/125 µ fiber-optic cable (Ethernet LANs) 1102.book Page 131 Tuesday, May 20, 2003 2:53 PM 132 Chapter ... Refraction Air 1.000 Glass 1.523 Diamond 2.419 Water 1.333 IR Speed of light in a vacuum Speed of light in a material = 1102.book Page 136 Tuesday, May 20, 2003 2:53 PM Optical Media 137 The Law ... was sometimes referred to as Cheapernet. Figure 3-12 Coaxial Cable—Thinnet 1102.book Page 129 Tuesday, May 20, 2003 2:53 PM 130 Chapter 3: Networking Media However, in both types of coaxial

Ngày tải lên: 04/07/2014, 18:20

... ports of switches and routers Be very careful! Multimode 100/140 Microns Multimode 62.5/125 Microns Multimode 50/125 Microns Single-Mode 10/125 Microns Trang 8The following summarizes the features ... 3-21 Figure 3-21 Light Wave Path Numerical Aperture Axis n1 n1 NA = Sin 0 = n 2 Ðn1 Where: n 1 is cladding index n 2 is core index n2 0 n0 n1 Light must fall inside this angle to be guided in the ... sensitive to the particular wavelength of light (850, 1310, or 1550 nm) generated by the transmitter at the far end of the fiber When Trang 10struck by a pulse of light at the proper wavelength,

Ngày tải lên: 04/07/2014, 18:20

... The Cisco Aironet 5 GHz 54 Mbps Wireless LAN client adapter is an IEEE 802.11a-compliant CardBus adapter that operates in the UNII-1 and UNII-2 bands. The client adapter 1102.book Page 158 ... fiber to be squeezed or stretched, which causes microbending. 1102.book Page 151 Tuesday, May 20, 2003 2:53 PM 152 Chapter 3: Networking Media To prevent fiber bends that are too sharp, fiber ... energy is lost. The farther a light 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

Ngày tải lên: 04/07/2014, 18:20

... 2 1 Hopping Pattern: C A D B E Freq. (GHz) B A E D C Time Frequency(GHz) 1 5 4 3 2.41 2.42 2.43 2.44 11 0 0 11 0 0 1 0 0 Chipping Sequence 1 Number Sent Interference 1 1 0 1 1 0 0 1 0 11 0 0 1 ... 802.11b, called Wi-Fi or high-speed wireless, refers to DSSS systems that operate at 1, 2, 5.5, and 11 Mbps All 802.11b systems are backward-compliant in that they also support 802.11 for 1- and ... Mbps 802.11g provides the same throughout as 802.11a but with backwards compatibility for 802.11g devices using Othogonal Frequency Division Multiplexing (OFDM) mod-ulation technology Cisco has

Ngày tải lên: 04/07/2014, 18:20

... through F) Remember that 10 * 10 can be written as 102(10 “squared,” or 10 raised to the second power, or 10 multiplied by itself 2 times 10 * 10 * 10 can be written as 103(ten “cubed,” A = Amplitude ... Logarithms As discussed in Chapter 1, “Introduction to Networking,” in networking, remember three important number systems: ■ Base 2 (binary) ■ Base 10 (decimal) ■ Base 16 (hexadecimal) Recall that ... of Two States (1/0, On/Off) • Voltage Jumps Between Levels chpt_04.fm Page 186 Tuesday, May 27, 2003 9:01 AM Trang 9Background for Studying Frequency-Based Cable Testing 187or 10 raised to the

Ngày tải lên: 04/07/2014, 18:20

... Pair 1 Pair 4 1 2 3 4 5 6 7 8 T568A Pair 3 Pair 2 Pair 1 Pair 4 1 2 3 4 5 6 7 8 T568B Correct T568B Wiring Reversed-Pair Wiring Fault Split-Pair Wiring Fault Transposed-Pair Wiring Fault 1 2 3 ... difference to note is the medium used for 10-Mbps Ethernet versus 100-Mbps and 1000-Mbps Ethernet In today’s networks, in which you see a mix of 10- and 1000-Mbps requirements, you must be aware ... Trang 1Figure 4-15 Power Sum Near-End Crosstalk (PSNEXT)Some Ethernet standards, such as 10BASE-T and 100BASE-TX, receive data from only one wire pair

Ngày tải lên: 04/07/2014, 18:20

... UTP, two pair 100 m (328 feet) Star ISO 8877 (RJ-45) 100BASE-TX EIA/TIA CAT 5 UTP, two pair 100 m (328 feet) Star ISO 8877 (RJ-45) 100BASE-FX 62.5/125 multimode fiber 400 m (1312.3 feet) Star ... Figure 4-21 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 ... deploy other 1000BASE-X technology without needing to change the physical interface/module on the router or switch. chpt_04.fm Page 210 Tuesday, May 27, 2003 9:01 AM Cabling the LANs 211 The fiber-optic

Ngày tải lên: 04/07/2014, 18:20

... connec-tion from a user to a Network Terminaconnec-tion 1 (NT1) device A terminal (T) interface is the electrical interface between an NT1 device and an NT 2 device, which is usually a private ... North America, the customer typically provides the NT1; in the rest of the world, the service provider pro-vides the NT1 device If the NT1 device needs to be provided by the customer, an ISDN ... with a U interface can be used A U interface has an NT1 built in If an external NT1 device is used or if the service provider uses an NT1 device, the router needs an ISDN BRI S/T interface Because

Ngày tải lên: 04/07/2014, 18:20

... 10BASE5 (500 m) 50 Ohm Coax N-Style 10BASE2 (185 m) 50 Ohm Coax BNC 10BASE-T 1000BASE-LX (550-5000 m) MM Fiber Sc 10BASE-TX (100 m) 100 Ohm UTP 100BASE-FX (228_412 m) MM Fiber SC 1000BASE-T 1000BASE-SX ... Switching.” 1102.book Page 253 Tuesday, May 20, 2003 2:53 PM Trang 6254 Chapter 5: Ethernet FundamentalsEthernet interfaces can range from US$10 to $100,000 Ethernet speeds can be 10, 100, 1000, or 10,000 ... Fiber optic 12. What type of connector is used for DSL connection? A. RJ-45 B. RJ-11 C. F 13. What type of connector is used to connect a router and a cable system? A. RJ-45 B. RJ-11 C. F 14. What

Ngày tải lên: 04/07/2014, 18:20

... octets in length and is represented by the following binary pattern: 10101010 10101010 10101010 10101010 10101010 10101010 10101010 ■ Start Frame Delimiter (SFD)—This a one-octet field that marks ... (ending in pattern 10101011, the 802.3 SFD) 6 Destination MAC Address 6 Source MAC Address 2 Type Field (46 to 1500 data—if less than 46 octets, a pad must be added to the end) 46 to 1500 Data and ... is nearly identical for all speeds of Ethernet (10/100/1,000/10,000 Mbps). Half-duplex Gigabit Ethernet 1000BASE-T and the “W” versions of 10-Gb Ethernet have certain timing issues that require

Ngày tải lên: 04/07/2014, 18:20

... following: On a 10 Mbps Ethernet, 1 bit at the MAC sublayer requires 100 nanoseconds (ns) to transmit At 100 Mbps, that same bit requires 10 ns to transmit, and at 1000 Mbps, it takes only 1 ns Table ... time for 10 and 100 Mbps Ethernet is 512 bit-times (64 octets) Slot time for 1000 Mbps Ethernet is 4096 bit-times (512 octets, including the extension) Slot time is not defined for 10 Gbps Ethernet ... Trang 1Figure 5-10 CSMA/CDNetworking devices are capable of detecting when a collision has occurred because the amplitude of the signal on the networking media increases

Ngày tải lên: 04/07/2014, 18:20

... enable the agreed Clock Pulses Data Pulses Coded Data D0 1 D1 0 D2 0 D3 0 D4 0 D5 1 D6 1 D7 1 D8 1 D9 0 D10 0 D11 0 D12 0 D13 0 D14 0 D15 0 Trang 10configuration and attempt to link accordingly Link ... threshold is around –1.5 volts, as measured on the coax cable Figure 5-17 shows a midframe in 10BASE2/10BASE5 collision captured by a digital storage oscilloscope Figure 5-17 10BASE2/10BASE5 Local Collision ... Autonegotiation As Ethernet grew from 10 to 100 and 1000 Mbps, one goal was to make each technol-ogy interoperable, even to the point that 10, 100, and 1000 interfaces could be directly connected

Ngày tải lên: 04/07/2014, 18:20

... should be chosen from the offered configurations. In other words, it is desirable for 10-/100-/1000-Mbps 1102.book Page 289 Tuesday, May 20, 2003 2:53 PM 290 Chapter 5: Ethernet Fundamentals ... Shared Media (Multiple Access) Extended Media (Multiple Access with Layer 1 Networking Device) Point-to-Point 1102.book Page 291 Tuesday, May 20, 2003 2:53 PM 292 Chapter 5: Ethernet Fundamentals ... 1102.book Page 290 Tuesday, May 20, 2003 2:53 PM Collision Domains and Broadcast Domains 291 ■ Extended shared-media environment—This is a special type of shared-media environment in which networking

Ngày tải lên: 04/07/2014, 18:20

... card), 10 NICs, 12 13 , 79, 81, 225–226 modem installation, 13 14 wireless, 91 NLP (Normal Link Pulse), 286 noise, 14 9, 15 7 narrowband interference, 19 0 sources of on copper media, 19 8 19 1, 19 6 19 7 FEXT, ... 15 9 16 1 fiber-optic networks 10 0BASE-FX, 332–334 cabling, 13 3 absorption, 15 0 as backbone medium, 894 bending, 15 1 cladding, 14 2 core, 14 3 dispersion, 15 0 duplex fiber, 14 1 GBIC connectors, 211 interducting, ... 211 interducting, 15 2 multimode, 14 4 noise, 14 9 scattering, 15 0 safe handling, 912 signaling, 19 2 19 4 single-mode, 14 3 14 5 splicing, 15 3 components of, 14 7 connectors, 14 8 patch panels, 14 9 receivers, 14 7 repeaters,...

Ngày tải lên: 04/07/2014, 18:20

... Wright 11 02.book Page iv Tuesday, May 20, 2003 2:53 PM Cisco Networking Academy Program CCNA 1 and 2 Companion Guide Third Edition Cisco Systems, Inc. Cisco Networking Academy Program Cisco Press 2 01 ... PM ii Cisco Networking Academy Program CCNA 1 and 2 Companion Guide Third Edition Cisco Systems, Inc. Cisco Networking Academy Program Copyright â 2003 Cisco Systems, Inc. Published by: Cisco ... Academy program, then you are not preparing with a Cisco trained and authorized Networking Academy provider. For information on the Cisco Networking Academy Program or to locate a Networking Academy, ...

Ngày tải lên: 04/07/2014, 18:20

... educational needs of the internetworking community, Cisco Systems established the Cisco Networking Academy Program. The Networking Academy is a comprehensive learning program that provides students ... the Cisco Networking Academy Program is in the forefront of this transformation. This Cisco Press title is one of a series of best-selling companion titles for the Cisco Networking Academy Program. ... Serial Line: Switched Serial IBM Mainframe 11 02.book Page xxiii Tuesday, May 20, 2003 2:53 PM xxvii Introduction Cisco Networking Academy Program CCNA 1 and 2 Companion Guide, Third Edition, supplements...

Ngày tải lên: 04/07/2014, 18:20

... number to a hexadecimal number 11 02.book Page 4 Tuesday, May 20, 2003 2:53 PM 8 Chapter 1: Introduction to Networking Figure 1- 1 Central Processing Unit Figure 1- 2 Floppy Disk Drive ■ Microprocessor—A ... Figure 1- 1). ■ Floppy disk drive—Can read and write to floppy disks (see Figure 1- 2). ■ Hard disk drive—Reads and writes data on a hard disk. The primary storage device in the computer. 11 02.book ... 11 02.book Page 2 Tuesday, May 20, 2003 2:53 PM xxxi ■ Chapter 14 , “Managing Cisco IOS Software,” examines the stages of the router boot sequence. It also covers how to use a variety of Cisco...

Ngày tải lên: 04/07/2014, 18:20

... did not become widely used until the early 19 80s, and the transfer of 11 02.book Page 14 Tuesday, May 20, 2003 2:53 PM 16 Chapter 1: Introduction to Networking determine if there is connectivity ... performs e-mail, file transfers, and other functions 11 02.book Page 17 Tuesday, May 20, 2003 2:53 PM 10 Chapter 1: Introduction to Networking Figure 1- 4 Expansion Slot Motherboard Components The motherboard ... and network (Layer 3) address. 11 02.book Page 15 Tuesday, May 20, 2003 2:53 PM 12 Chapter 1: Introduction to Networking Network Interface Cards As shown in Figure 1- 6, a NIC is a printed circuit...

Ngày tải lên: 04/07/2014, 18:20

... (2 4 = 16 ), as you will see in Table 1- 6 in a moment. Instead of writing 10 1 010 10 .11 110 000 .11 0000 01. 111 00 010 . 011 1 011 1. 010 100 01 you can write the much-shorter hex equivalent: AA.F0.C1.E2.77. 51. To ... Exponent 2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0 Place Value 12 8643 216 84 21 Example: 10 110 00 010 110 11 02.book Page 23 Tuesday, May 20, 2003 2:53 PM 24 Chapter 1: Introduction to Networking Example: 1A2C = (1 ∗ 16 3 = 65536) + (10 (A) ... represents 10 0 (1) , and the second position represents 10 1 (10 ∗ 1 = 10 ). The third position represents 10 2 (10 ∗ 10 = 10 0). The seventh position to the left rep- resents 10 6 (10 ì 10 10 10 10 ...

Ngày tải lên: 04/07/2014, 18:20