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Protocol Top Related Articles
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1). Cisco CCNA Exam Tutorial: Directly Connected Serial Interfaces By : Chris Bryant, CCIE #12933
To pass the CCNA exam, you've got to master quite a few services and routing protocols that may be new to you. Between RIP, IGRP, EIGRP, OSPF, and switching, there are hundreds of details you've got to absorb! It's easy to spend all your time on those topics and not pay proper attention to "easier" technologies, and then all of a sudden on exam day you can't quite remember the details of those particular services.
Article Related to: ccna, exam, free, pass, dte, dce, serial, interface, directly, connected, clockrate, certification, line, protocol, show, interface, controllers
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2). Cisco CCNA Exam Tutorial: Troubleshooting Directly Connected Serial Interfaces By : Chris Bryant, CCIE #12933
CCNA exam success depends largely on noticing the details, and this is especially true of configurations involving directly connected serial interfaces. And of course, it's not enough to notice these details - you've got to know what to do about them!
A Cisco router is a DTE by default, but directly connecting two DTEs with a DCE/DTE cable is not enough.
Article Related to: cisco, exam, dce, dte, clockrate, directly, connected, serial, interfaces, line, protocol, down, show, controller, bryant, advantage, 12933
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3). Cisco CCNA / CCNP Certification Exam Review: Protocol Basics By : Chris Bryant, CCIE #12933
To earn your Cisco CCNA certification and pass the BSCI CCNP exam, you have to know your protocol basics like the back of your hand! To help you review these important concepts, here's a quick look at the basics of RIPv1, RIPv2, IGRP, and EIGRP.
RIPv1: Broadcasts updates every 30 seconds to the address 255.255.255.255. RIPv1 is a classful protocol, and it does not recognize VLSM, nor does it carry subnet masking information in its routing updates.
Article Related to: ccna, exam, protocol, ccnp, bsci, protocol, rip, igrp, eigrp, multicast, address, free, equal, cost
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4). How the Internet actually works By : Chris Graham
To most people, the Internet is the place to which everyone plugs in their computer and views webpages and sends e-mail. That's a very human-centric viewpoint, but if we're to truly understand the Internet, we need to be more exact:
The Internet is THE large global computer network that people connect to by-default, by virtue of the fact that it's the largest.
Article Related to: internet, tcpip, protocol, url, http, ip, address, modem, website, dns, nameserver, ipaddress, webpage, web, ssl
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5). Network+ Certification Exam Tutorial: ARP and Proxy ARP Explained By : Chris Bryant, CCIE #12933
In yesterday's Network+ tutorial, we talked about the importance of Address Resolution Protocol (ARP) in today's networks. A host PC must have the MAC and IP addresses of a remote host in order to send data to that remote host, and it's ARP that allows the local host to request the remost host to send the local host its MAC address through an ARP Request.
Article Related to: network, network+, exam, pass, arp, proxy, address, resolution, protocol, router, switch, ccna, a+
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6). CCNP Certification / BCMSN Exam Tutorial: Getting Started With HSRP By : Chris Bryant, CCIE #12933
Defined in RFC 2281, HSRP is a Cisco-proprietary protocol in which routers are put into an HSRP router group. Along with dynamic routing protocols and STP, HSRP is considered a high-availability network service, since all three have an almost immediate cutover to a secondary path when the primary path is unavailable.
One of the routers will be selected.
Article Related to: ccnp, cisco, certification, hsrp, hot, standby, routing, protocol, pass, free, mac, standby, router
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7). Cisco CCNA / CCNP Certification Exam: Same Command, Different Results By : Chris Bryant, CCIE #12933
As a CCNA or CCNP, one thing you've got to get used to is that change is constant. Cisco regularly issues new IOS versions, not to mention the many different kinds of hardware they produce! While it's always nice to have "the latest and the greatest" when it comes to routers, switches, firewalls, etc., we have to be prepared for the fact that not all.
Article Related to: ccna, ccnp, bsci, bcran, free, exam, tutorial, span, tree, protocol, router, switch, ios, 5000
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8). Cisco CCNA / CCNP Certification Exam: Troubleshooting Direct Serial Connections By : Chris Bryant, CCIE #12933
A prime topic of your CCNA and CCNP CIT exams will be connecting Cisco routers directly via their Serial interfaces, and while the configuration is straightforward, there are some vital details and show commands you must know in order to pass the exams and configure this successfully in production and home lab networks. Let's take a look at a sample configuration.
Article Related to: ccna, ccnp, cit, dte, dce, serial, connection, cable, show, interface, serial, line, protocol, up
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9). Cisco CCNP / BCMSN Exam Tutorial: Spanning Tree Protocol (STP) Timers By : Chris Bryant, CCIE #12933
In your BCMSN / CCNP exam study, it's easy to overlook some of the details of Spanning Tree Protocol (STP). After all, you learned all of that in your CCNA studies, right? Not necessarily! While some of the BCMSN material will be a review for you, there are some details regarding familiar topics that you need to learn. That includes the timers for STP - Hello Time, MaxAge, and Forward Delay.
Article Related to: ccnp, bcmsn, certification, exam, pass, free, stp, spanning, tree, protocol, forward, delay, timer
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10). Cisco CCNA Certification Exam Tutorial: RIP Details You Must Know By : Chris Bryant, CCIE #12933
RIP isn't exactly the most complex routing protocol on the CCNA exam, but that makes it easy to overlook some of the important details you must keep in mind in order to pass the exam! To help you review for the exam, here are just a few of those details!
RIP’s default behavior is to send version 1 updates, but to accept both version 1 and 2 routing updates.
Article Related to: cisco, ccna, pass, free, exam, rip, protocol, certification, router, swtich, configure, distance
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11). Network+ Certification Exam Tutorial: DHCP And RARP By : Chris Bryant, CCIE #12933
Part of passing the Network+ exam is mastering the many different protocols and services you're introduced to in your studies, and that's especially hard when two protocols do much the same thing! That's the case with RARP and DHCP, so let's take a close look at these two protocols and why we use them in the first place.
Whether you've been around networks for a while or are just getting started with your IT career, you'll quickly notice that many basic tasks in networking can be handled either statically or dynamically.
Article Related to: network+, exam, pass, certification, dhcp, rarp, arp, ip, address, resolution, protocol, dynamic
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12). Cisco CCNA Certification Exam Tutorial: The OSPF RID By : Chris Bryant, CCIE #12933
OSPF is a major topic on your CCNA exam, as well it should be. OSPF is a widely-used WAN protocol, and you need to learn the fundamentals before moving on to more complicated configurations. One such detail is the OSPF Router ID, or RID.
The RID is the dotted decimal value by which other OSPF routers will identify a given OSPF router. There are some interesting defaults for this value, and a command you should know to hardcode the RID.
Article Related to: cisco, ccna, exam, certification, ospf, rid, router, id, protocol, router, clear, ip, process, ccnp
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13). Cisco CCNP / BCMSN Exam Tutorial: Dynamic Trunking Protocol (DTP) By : Chris Bryant, CCIE #12933
When you're studying to pass the BCMSN exam on the way to earning your CCNP certification, you're going to add to your CCNA knowledgebase every step of the way. Nowhere is that more than configuring a trunk between two switches.
You know that IEEE 802.1Q ("dot1q") and ISL are your two choices of trunking protocols, and you know the main differences between the two.
Article Related to: dtp, trunk, ccnp, bcmsn, exam, free, tutorial, dynamic, trunking, protocol, switch, port, nonegotiate
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14). Cisco CCNP / BSCI Tutorial: Comparing OSPF and ISIS Hellos By : Chris Bryant, CCIE #12933
While studying to pass the BSCI exam and preparing to earn your CCNP certification, you'll quickly notice that while OSPF and ISIS are both link-state protocols, there are a lot of differences between the two. One major difference is the way the two protocols handle hello packets.
Hello packets are imperative to keeping OSPF and ISIS adjacencies alive.
Article Related to: ccnp, bsci, exam, free, pass, certification, tutorial, ospf, isis, hello, level, link, state, protocol, router, switch
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15). Cisco CCNP / BCMSN Exam Tutorial: The Four (Or Five) STP Port States By : Chris Bryant, CCIE #12933
As a CCNP candidate and a CCNA, you may be tempted to skip or just browse the many details of Spanning Tree Protocol. After all, you learned all of that in your CCNA studies, right? That's right, but it never hurts to review STP for a switching exam! Besides, many of us think of the four STP port states - but officially, there's a fifth one!
Disabled isn't generally thought of as an STP port state, but Cisco does officially consider this to be an STP state.
Article Related to: cisco, ccnp, certification, spanning, tree, stp, protocol, bcmsn, disabled, listening, learning, blk
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16). Network+ Certification Exam Tutorial: Address Resolution Protocol (ARP) By : Chris Bryant, CCIE #12933
When you're studying for the Network+ exam, you've got to master the fundamentals of networking, because the Network+ is a hard exam to pass due to the range of information covered. One such fundamental is the Address Resolution Protocol, commonly referred to as ARP.
ARP operates at the Data Link layer of the OSI model, and its purpose is often overlooked.
Article Related to: network+, network, ccna, cisco, exam, comptia, arp, address, resolution, protocol, router, broadcast
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17). Cisco CCNA Exam Tutorial: Cisco Discovery Protocol (CDP) By : Chris Bryant, CCIE #12933
The Cisco Discovery Protocol (CDP) sure looks simple enough, but there are quite a few details to know for success on the CCNA exam. In your CCNP studies, you'll be introduced to additional uses for CDP, but for now it's enough to know that CDP is designed to give you information regarding directly connected Cisco routers and switches.
CDP runs by default between all directly connected Cisco devices.
Article Related to: cisco, ccna, exam, cdp, discovery, protocol, switch, router, walk, network, pass, bryant, chris
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