cisco networking academy program ccna v4 0 download

... Re 76 Os 77 Ir 78 Pt 79 Au 80 Hg 107 Bh 108 Hs 109 Mt 110 111 112 1 H 3 Li 4 Be 11 Na 12 Mg 58 Ce 59 Pr 60 Nd 61 Pm 62 Sm 63 Eu 64 Gd 65 Td 66 Dy 67 Ho 68 Er 69 Tm 90 Th 91 Pa 92 U 93 Np 94 Pu ... Dy 67 Ho 68 Er 69 Tm 90 Th 91 Pa 92 U 93 Np 94 Pu 95 Am 96 Cm 97 Bk 98 Cf 99 Es 100 Fm 101 Md 70 Yb 71 Lu 102 No 103 Lr 1A 2A 3B 4B 5B 6B 7B 8B 1B 2B 3A 4A 5A 6A 7A 8A 114 116 118 Trang 9Figure ... 22 Ti 23 V 24 Cr 37 Rb 38 Sr 39 Y 40 Zr 41 Nb 42 Mo 55 Cs 56 Ba 57 La 72 Hf 73 Ta 74 W 87 LI 88 Ra 89 Ac 104 Rf 105 Db 106 Sg 25 Mn 26 Fe 27 Co 28 Ni 29 Cu 30 Zn 43 Tc 44 Ru 45 Rh 46 Pd 47 Ag

Ngày tải lên: 04/07/2014, 18:20

... Strength—Cold-rolled copper has a tensile strength 3500 to 4900 kilograms per square centimeter. Copper keeps its strength and toughness up to about 400° Fahrenheit (F) (204° Celsius [C]). This section focuses ... demonstrate the ability to measure voltage with the multimeter. 1102.book Page 119 Tuesday, May 20, 2003 2:53 PM 120 Chapter 3: Networking Media Current Electrical current is the flow of charges ... features of UTP cable: ■ Speed and throughput—10 to 1000 Mbps ■ Average cost per node—Least expensive ■ Media and connector size—Small ■ Maximum cable length—100 m (short) Commonly used types of UTP

Ngày tải lên: 04/07/2014, 18:20

... (0.000000001 m) in length and is abbreviated nm. Electromagnetic energy with wave- lengths between 700 nm and 400 nm is called visible light. The longer wavelengths of light (those around 700 ... about 300,000 kilometers per second or 186,000 miles per second or the speed of light. Human eyes can sense electromagnetic energy only with wavelengths between 700 nanometers and about 400 nanometers. ... than 90 degrees, it is bent away from the normal. The reason for this is that air has a lower index of refraction (about 1.000) than does diamond. 1102.book Page 138 Tuesday, May 20, 2003 2:53

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... distances than multimode fiber Single-mode fiber can carry LAN data up to 3000 meters Multimode is only capable of up to 2000 meters Lasers and single-mode fibers are more expensive than LEDs and ... 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 ... 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 fiber core. Trang 3Fiber-Optic CablesFiber-optic cable is a networking

Ngày tải lên: 04/07/2014, 18:20

... 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 ... the problem of multiple paths that the light signal can follow. Chromatic 1102.book Page 150 Tuesday, May 20, 2003 2:53 PM Optical Media 151 dispersion, however, is a characteristic of both ... 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 is

Ngày tải lên: 04/07/2014, 18:20

... as 109 than as 1,000,000,000 Many calculations involved in cable testing involve numbers that are very large, so exponents are the preferred format Decibels An important way of describing networking ... 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 ... industry standards specified for the data rate used to transmit signals over Ethernet (10, 100, 1000, or 10,000 Mbps) The use of signals in this text refers to the data signals that move from the

Ngày tải lên: 04/07/2014, 18:20

... 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 ... measured in the hundredths of nanoseconds (one nanosecond is one-billionth of a second, or 0.000000001 second) The TIA/EIA-568-B standard sets a limit for propagation delay for the various categories ... (IEEE) 802.3 specification released in 1980 Later, the IEEE extended the 802.3 committee to three new committees known as 802.3u (Fast Ether-net), 802.3z (Gigabit Ethernet over Fiber), and 802.3ab

Ngày tải lên: 04/07/2014, 18:20

... subscriber connector (SC) 1000BASE-CX STP 25 m (82 feet) Star ISO 8877 (RJ-45) 1000BASE-T EIA/TIA CAT 5 UTP, four pair 100 m (328 feet) Star ISO 8877 (RJ-45) 1000BASE-SX 62.5/50 micro multimode fiber ... fiber; 550 m (1804.5 feet) for 50 micro fiber Star SC 1000BASE-LX 62.5/50 micro multimode fiber; 9-micron single- mode fiber 440 m (1443.6 feet) for 62.5 micro fiber; 550 m (1804.5 feet) for 50 micro ... (BNC) 10BASE5 50-ohm coaxial (thicknet) 500 m (1640.4 feet) Bus Attachment unit interface (AUI) 10BASE-T EIA/TIA CAT 3, 4, 5 UTP, two pair 100 m (328 feet) Star ISO 8877 (RJ-45) 100BASE-TX EIA/TIA

Ngày tải lên: 04/07/2014, 18:20

... forwards the frame to the appropriate segment, as shown in Figure 4-34. chpt_04.fm Page 219 Tuesday, May 27, 2003 9:01 AM 220 Chapter 4: Cable Testing and Cabling LANs and WANs Figure 4-33 Bridges ... or not to allow the signal to continue to other segments of the network. chpt_04.fm Page 220 Tuesday, May 27, 2003 9:01 AM LAN Connection Devices 221 ■ If the destination address is unknown to ... as Remote Authentication Dial-In User Service (RADIUS). chpt_04.fm Page 224 Tuesday, May 27, 2003 9:01 AM LAN Connection Devices 225 Cisco Systems has developed a derivation of EAP based on mutual

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... to as xDSL. The Cisco 800 series of fixed-configuration DSL routers provides enhanced security, low cost of ownership, proven reliability, and safe investment through the power of Cisco IOS Software ... telecommuters The Cisco 827-4V ADSL router has one ADSL interface, as shown in Figure 4-50, that can connect users to the Internet or to a corporate LAN via DSL Figure 4-50 Cisco 827-4V Router ... networks and administration becomes unmanageable Requires NOS software such as in Windows NT/2000/XP, Novell NetWare, or UNIX Each user must be trained to perform administrative tasks Requires

Ngày tải lên: 04/07/2014, 18:20

... itself exponent times (e.g., 10 3 = 10 * 10 * 10 = 1000). ■ Logarithms are similar to exponents. A logarithm to the base of 10 of a number equals the exponent to which 10 has to be raised to equal ... following is an 802.3u specification? A. 10BASE-F B. 10BASE-T C. 100BASE-TX D. 1000BASE-CX 2. Which of the following is the most appropriate choice for Ethernet connectivity? A. Use 10-Mbps Ethernet ... equals the exponent to which 10 has to be raised to equal the number (e.g., log 10 1000 = 3 because 10 3 = 1000). ■ Decibels are measurements of a gain or loss in the power of a signal. Negative

Ngày tải lên: 04/07/2014, 18:20

... range from US$10 to $100,000 Ethernet speeds can be 10, 100, 1000, or 10,000 Mbps This section explores more details of original Ethernet (10BASE-T), Fast Ethernet (100BASE-TX and 100BASE-FX), Gigabit ... 10BASE-TX (100 m) 100 Ohm UTP 100BASE-FX (228_412 m) MM Fiber SC 1000BASE-T 1000BASE-SX (220-550 m) MM Fiber SC 10BASE-(V 1102.book Page 257 Tuesday, May 20, 2003 2:53 PM Trang 10258 Chapter ... Sublayer 802.3 Media Access Control Physical Signaling Layer Physical Medium 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

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... 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 the ... 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 ... Field (Length if less than 0600 in hexadecimal—otherwise, protocol Type) 46 to 1500 Data and Pad 4 Frame Check Sequence (CRC Checksum) 1102.book Page 262 Tuesday, May 20, 2003 2:53 PM History and

Ngày tải lên: 04/07/2014, 18:20

... or below 1000 Mbps, the standard describes how a transmission can be no smaller than slot time Slot time for 10 and 100 Mbps Ethernet is 512 bit-times (64 octets) Slot time for 1000 Mbps Ethernet ... the 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 ... offer 100 percent efficiency in both directions This means that you can get 20 Mbps with a 10-Mbps Ethernet running in full-duplex operation A 100-Mbps switch poten-tially can offer 200 Mbps to

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... 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 ... 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 ... the Ethernet errors Jabber Jabberis defined several places in the 802.3 standard as being a transmission of at least 20,000 to 50,000 bit-times in duration However, most diagnostic tools report jabber

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... 54–55 Ethernet 10- Gbps, 347–353 10- Mbps, 317, 3 20 10BASE2, 321–322 10BASE5, 3 20 321 10BASE-T, 322–323, 325–326, 328 100 -Mbps, 328–329 100 BASE-FX, 332–334 100 BASE-T, 329–332 100 0-Mbps, 337–339 100 0BASE-LX, ... Ethernet, 337–339 100 0BASE-LX, 342–344 100 0BASE-SX, 342–345 100 0BASE-T, 339–342 architecture, 345–347 global configuration mode (CLI), 592–593 global parameter configuration, Cisco IOS Software, ... 405 converting decimal to binary, 389–391 dotted decimal notation, 388 host addresses, 386 host name resolution, 606 – 607 IPv4, 392, 394 address classes, 394–397 private, 400 – 402 public, 400 – 402 reserved...

Ngày tải lên: 04/07/2014, 18:20

... 1 102 .book Page iv Tuesday, May 20, 200 3 2:53 PM Cisco Networking Academy Program CCNA 1 and 2 Companion Guide Third Edition Cisco Systems, Inc. Cisco Networking Academy Program Cisco Press 201 ... . 154 1 102 .book Page ix Tuesday, May 20, 200 3 2:53 PM ii Cisco Networking Academy Program CCNA 1 and 2 Companion Guide Third Edition Cisco Systems, Inc. Cisco Networking Academy Program Copyright ... 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 1 102 .book Page xxiii Tuesday, May 20, 200 3 2:53 PM xxvii Introduction Cisco Networking Academy Program CCNA 1 and 2 Companion Guide, Third Edition, supplements...

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... 1 102 .book Page 2 Tuesday, May 20, 200 3 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 ... number ■ Convert a binary number to a hexadecimal number 1 102 .book Page 4 Tuesday, May 20, 200 3 2:53 PM 8 Chapter 1: Introduction to Networking Figure 1-1 Central Processing Unit Figure 1-2 Floppy ... Memory boards with RAM chips plug into the motherboard. 1 102 .book Page 8 Tuesday, May 20, 200 3 2:53 PM 6 Chapter 1: Introduction to Networking The Internet is the largest data network in the...

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... and performs e-mail, file transfers, and other functions 1 102 .book Page 17 Tuesday, May 20, 200 3 2:53 PM 10 Chapter 1: Introduction to Networking Figure 1-4 Expansion Slot Motherboard Components The ... built-in or adapter card-type NIC. 1 102 .book Page 13 Tuesday, May 20, 200 3 2:53 PM Testing Connectivity with Ping 15 files and graphics began to be desirable. The 300 bps speed quickly became intolerable, ... intolerable, and modem speeds started to increase. By the 1990s, modems were running at 9 600 bps. They reached the current standard of 56 kbps (56 ,00 0 bps) by 1998. Inevitably, the high-speed services...

Ngày tải lên: 04/07/2014, 18:20