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Download at hackbus.info hackbus.info “Head First Networking takes network concepts that are sometimes too esoteric and abstract even for highly. Frustrated with networking books so chock-full of acronyms that your brain goes into sleep Head First Networking's unique, visually rich format provides a task- based Available for download, 0 ACM eBooks: The ACM Learning Center. A Brain-Friendly Guide Head First Networking y «See how John swept Mary away with his dynamic F addressing and translation skills t' * iJsJ. Ebook about networking . Al Anderson Ryan Benedetti Download at Boykma.

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Head First Networking. Networking. Free Books Download PDF / Free Books Online / Free eBook Download PDF Wireless Home Networking For Dummies. Head First Networking's unique, visually rich format provides a task-based approach to computer networking that makes it easy to get your. Read "Head First Networking A Brain-Friendly Guide" by Al Anderson available from Rakuten Kobo. Sign up today and get RS. off your first purchase.

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VoIP and Unified Communications. William A. Gerald Carter. Craig Hunt. Harri Holma. Essential SNMP. Douglas Mauro. Linux Administration: A Beginners Guide, Sixth Edition. Wale Soyinka. Jonathan Hassell. Cisco TelePresence Fundamentals. Tim Szigeti. Cisco IOS in a Nutshell. James Boney. Computers as Components.

Marilyn Wolf. Embedded Systems Architecture. Tammy Noergaard. IPv6 Essentials. Silvia Hagen. Juniper SRX Series. Brad Woodberg. Peter Wilson.

Smart Home Hacks. Gordon Meyer. Linux Networking Cookbook. Carla Schroder. Essential System Administration. Kerry J. Chi-Yu Huang. Zero Configuration Networking: Daniel H Steinberg.

George Rouse. Windows PowerShell Cookbook. Lee Holmes. Aviva Garrett. Zabbix Network Monitoring Essentials. Andrea Dalle Vacche. Tom Carpenter. Snort Cookbook. Angela Orebaugh. Houman Zarrinkoub. Junos Enterprise Routing. Peter Southwick. Vibrant Publishers. Interconnecting Smart Objects with IP. Adam Dunkels. Jon Buhagiar. ScreenOS Cookbook. Stefan Brunner. He enjoys skiing and horseback riding with his family in the mountains of western Montana.

Rohn Wood lives and works in Montana trying to bring high performance computing to the old West. A full time employee of the University of Montana and half-time employee of the University of Washington, he makes his living off his UNIX chops and works remotely from his home in the Bitterroot Mountains with a view down into the valley a few miles from Travelers Rest where Lewis and Clark laid over with Corps of Discovery two hundred years ago.

Technical Reviewers: Thanks to our editor, Brett McLaughlin, who dove into this project when he had a massive load of other things to do.

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Brett, you are a juggernaut of production! Ryan would especially like to mention that his sessions with Brett and Al kept him going during a difficult life transition. Thanks, guys! Thanks to Dawn Griffiths for the excellent and magical work she did to shape this book up and make it look beautiful. Thanks also to the Head First folks we met in Boston, especially our brothers and sisters-in-arms: We will never forget the day we discovered the Head First series at the bookstore.

Thanks to Kathy Sierra and Bert Bates for lighting up the neurons of geeks everywhere. Without Emily, my wife, I would have not been able to write this book. She took care of business while I hunkered down in the den all those countless weekends and evenings. I love you honey!

I love you guys too! Finally, my faithful dog CC, she was always with me in the den, sleeping of course. Thank you to my daughter, Josefina, and my son, Vincenzo, who love books as much as I do. Thanks to my sweetie, Shonna Sims, who believed in me just when I was about to give up on this book.

Tracee Jamison, Yumi Hooks, Dr.

Paul Hansen without whom I never would have gotten into technology in the first place. Thanks to the IT students of Salish Kootenai College, without whom we would never have been inspired to write this book in the first place. Try it for free at http: Will I ever get his mind off of the network?

They offer scenic tours, excursions and a handy shuttle service between the islands. Their service is proving popular with tourists and locals alike. Coconut Airways depends on their flight booking system.

Coconut Airways needs to get their network up and running again, and fast. Think you can help them out? What sort of problems do you see? Circle each one. The booking system network cable is busted It looks like a break in the flight booking network cable is giving the Coconut Airways staff network errors.

If we can fix the network cable, that should get rid of the messages, and Coconut Airways will be able to book passengers on their flights again. So how do you think we should fix the network cable? All ofthe weight of the cablesresting on one anothermight cause problems in thelong run.

Put your fiber optic devices closer to wherethe cables come in to therack. In this case, thetop of the rack would be best. Gravity and a little nudge could drop your power. Bind your cables and run them along a stable surface. That way you reduce tangling, snags, and confusion.

Label your devices on the front and the back. Which cable goes where? Label your wires so that you can troubleshoot problems more efficiently. Check your connectors and ports regularly. You never know when a connector will pop, especially when you have dangling cables. There are two key things we need to do in order to mend the cable and get the flight booking system up and running again.

We need to cut out the broken part of the cable. By cutting out the broken part of the cable, we lose the connector on the end. So what sort of cable are we dealing with here?

What sorts of network cables do you already know about? How do you think they are different from one another? The jacket and the wires inside appear to have been chewed. RJ connector Download at Boykma. It has two distinguishing features. First of all, it has an unshielded twisted pair cable or UTP cable.

Secondly, it takes an RJ connector on either end. Most Ethernet networks run on CAT-5 cables. CAT-5 cables have print on the outside giving you important information about the cable. As an example, you can look on the outside of the cable to see what type it is, what the speed is, and any relevant standards. This is an RJ connector. It allows you to plug your cable into places. Writing on the outside ofthe cable tells you usefulinformation such as the speed.

One pair is brown, another pair is blue, another pair is green, and the final pair is orange. Each pair consists of one plain and one striped wire. So why are the pairs twisted? This means that you can get electromagnetic interference and crosstalk— both of which are bad for your network data. When the wires are twisted, the magnetic field around the wire is effectively disrupted so that any interference is reduced. The more twists there are in the pairs, the better.

This is the outer jacket of the UTP cable. There are four colored, twisted pairs of wire. The colors are brown, blue, green and orange. Each pair consists of a plain and striped wire of the same color. In this pair, one of the wires is plain orange, and the other has orange and white stripes.

See, being twisted can be a good thing Each color has a specific meaning, and so does the solidity of the color. The color solidity shows the wire polarity. If a wire is striped, then this means that it is positive. If a wire is solid, then the wire is negative.

Orange and green wires send and receive data. The orange pair sends data, while the green pair receives data. Blue and brown wires are reserved for future bandwidth capacity. The cable standards folks designed CAT-5 with the extra colored wires so that they could be used for higher bandwidths in the future. The green pair receives data Striped wires are positive, and solid wires are negative. Solid wires are negative.

Head First Networking - O'Reilly Media

Network speed tells us the rate at which data can move on a wire. Bandwidth is a capacity; speed is a rate. Bandwidth tells you the maximum amount of data that your network can transmit.

Speed tells you the rate at which the data can travel. The speed of a CAT-5 cable changes depending on conditions. What is Base-T?

Base-T refers to the different standards for Ethernet transmission rates. The 10 Base-T standard transfers data at 10 megabits per second Mbps.


The Base-T standard transfers data at Mbps. The Base-T standard transfers data at a massive Mbps. Megabits per second Mbps is a bandwidth rate used in the telecommunications and computer networking field. One megabit equals one million bursts of electrical current aka binary pulses. Megabytes per second MBps is a data transfer rate used in computing. One megabyte equals 1, , bytes, and one byte equals 8 binary digits aka bits.

All you need is a pair of wire cutters, a utility knife, a crimping tool, and an RJ connector. Cut the broken part out. Cut the cable well before the break to ensure that you have a good set of wire ends.

Make the cut as straight as possible so that the individual wires are the same length. Untwist the wires so that you can line them up with the slots on the RJ connector. Each wire fits into a slot in the RJ connector.

Are you trying to get me electrocuted or something? How do I know which position each wire goes in? Do you expect me to just guess???

Where you put each wire is important. It allows you to plug your cable into a wall jack or the network port of a network device like a computer. Each wire in the cable goes into a slot inside the RJ connector, and this connects it to a pin in the connector.

Each wire in the cable goes into a slot in the RJ connector. This fixes the wire to a pin in the connector. So which wire goes where? The position of each wire is important. When you plug an RJ connector into a jack, the pins on the connector make contact with pins in the jack.

If the wires are in the correct position, this allows information, in the form of electrons, to flow. The order of the wires in an RJ connector conforms to one of two standards. These standards are A and B. Striped green, solid green, striped orange, solid blue, striped blue, solid orange, striped brown, solid brown. Can you see any similarities between the A and B wire orders? The order for each standard is basically the same except the orange and green wires are switched over.

So which standard should you use? When you attach an RJ connector, the key thing is that both ends of the cable use the same standard. Before fitting a new RJ connector, take a look at the other end of the cable. If the other end of the cable uses standard A for the RJ wire order, then fit your new RJ connector using the A standard.

If it uses B, then use this standard instead. Striped orange, solid orange, striped green, solid blue, striped blue, solid green, striped brown, solid brown.

Striped wires alternate with solid colored wires. The B wire order is like the A wire order but with the position of the green and orange wires switched around.

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What should the wire order be on the other end? Draw a line between each wire and its rightful slot. Normally, he could jump on his favorite search engine to find the pin and wire color arrangement, but the storm has taken out his connection to the Internet. What can he do? Suddenly, Jack has an idea and leaves the room armed with a pair of scissors. How did Jack solve the problem without looking up Standard B? Five Minute Mystery Download at Boykma.

The good end of the broken Coconut Airways network cable has an RJ connector wired up using standard B. Both ends of the cable need to follow the same wiring standard, so make a note of what the other end uses. Once the lines are in their proper slots, place the RJ into the crimping tool, and then squeeze the tool to crimp the RJ snugly onto the cable. Check the end of the RJ connector to ensure that the wire is seated correctly in each slot.

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Five Minute Mystery Solved Q: Through common use, we have come to call an 8P8C connector an RJ connector. The acronym 8P8C stands for 8 positions, 8 contacts. The RJ connector looks a lot like an 8P8C connector, so over time, many folks mislabeled the connector.

Now, through that common but incorrect use, more people call an 8P8C connector an RJ connector. Why should I always use the same wiring standard on both ends of the cable? Always check the opposite end of the cable and match the wire pair configuration. What is a crossover cable used for? Suppose you want to connect a laptop to a desktop computer. One way of doing this would be to use a crossover cable, a cable that can send and receive data on both ends at the same time.

A crossover cable is different from a straight-through cable in that a straight-through cable can only send or receive data on one end at a time. How long should I make my CAT-5 cable?

The general rule of thumb is that you measure the distance between the devices you want to connect and add one to two feet for flexibility of movement. The maximum length of CAT-5 is feet meters. Before too long, all of their scheduled flights are fully booked and ready for take-off.

Hey, not so fast! What do you think might have gone wrong?

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They need you to save the day for them again. It looks like a hungry critter has taken a good chunk out of one of the coaxial cables, and the damaged cable has brought things to a standstill. What differences do you see between the two networks?

Why do you think they are different? Coaxial T-Connector to connect a workstation to the coaxial bus. Coaxial Terminator Without this, the network crashes. The rest of the building The basement coax network Download at Boykma.

Just like CAT-5 cables, coaxial cables are used to create networks. There are two key differences between them.

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The cables use different sorts of connectors and terminators. CAT-5 cables use RJ connectors. Coaxial cables, on the other hand, use BNC connectors, T-connectors, and terminators. The sort of connector you use depends on why you need it. A coaxial cable has a jacket on the outside, just like a CAT-5 cable. How do we get network traffic to move between networks? Routers connect networks by doing the math Back at the Moonbase Are you ready to program the router?

You just created this router config file! Chapter 7 Routing Protocols: Routing tables tell routers where to send packets Each line represents a different route So how do we enter routes? Routes help routers figure out where to send network traffic So are the moonbases now connected?

Back on the moon So how do we troubleshoot bad routes? The network address changes keep on coming We have lift off! Chapter 8 The Domain Name System: First install a DNS name server The emails are working! Chapter 9 Monitoring and Troubleshooting: Too much information can be just as bad as not enough How do you know which events are important?

Chapter 10 Wireless Networking: First make sure the client has DHCP turned on