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Cisco CCNA certification covers troubleshooting your own work and that of others. CCNA training, the best that you can do is, in fact, troubleshooting own Cisco router and switch configurations - as I always tell my students, "I can guarantee that every error you make before, and You will see probably a day. "Such a common error involves two very important issues Cisco CCNA certification - Frame Relay and routing protocols. A student worked on their Cisco CCNA exam at home Laboratory, came with an interesting problem. He Frame Relay in a hub-and-spoke configuration with R1 as a hub and R2 and R3 as the spokes. He wrote the following statements under View: Frame Relay card ip 172.12.123.2 122 Frame Relay card ip 172.12.123.3 123 He could ping the two spokes from the hub, so he assumed everything was working properly. Then he configured RIP version 2 on the router and had the following results after running "debug ip rip" clearing and routing table with a "clear ip route *": 03:33:01: IP: s = 172.12.123.1 (local), d = 224.0.0.9 (Serial0), Article 72, sending broad / Multicast — 03:33:01: IP: s = 172.12.123.1 (local), d = 224.0.0.9 (Serial0), Article 72, encapsulation failed You may have already spotted the problem, and if you have your CCNA certification exam studies are good! The problem is that the "broadcast" option has been left out of the frame map statements. Broadcast is so configured that over the statements as part of the card to send to broadcasts and multicasts in the frame link. As you know from your CCNA certification exam studies, RIP version 1 sends updates and multicasts RIP version 2, so that the "broadcast" option must be available, either for the version to send updates by using the frame mappings. He then wrote statements show the frame as shown …. R1 (config-if) frame-card ip 172.12.123.2 122 broadcast — R1 (config-if) frame-card ip 172.12.123.3 123 broadcast — .. And the RIP updates went as expected. R1 debug IP RIP RIP protocol debugging on R1 * ip route clear 06:22:13: RIP: Send general request to Loopback0 to 224.0.0.9 06:22:13: RIP: Send general request to Serial0 to 224.0.0.9 06:22:13: RIP: v2 ignored package of 1.1.1.1 (derived from one of our addresses ) 06:22:14: RIP: Update from v2 receive 172.12.123.3 on Serial0 06:22:14: 1.1.1.1/32 -> 0.0.0.0 hops into 3 06:22:14: 2.2.2.2/32 -> 0.0.0.0 and 2 hops 06:22:14: 3.3.3.3/32 -> 0.0.0.0 hops in 1 06:22:14: 172.12.23.0/24 -> 0.0.0.0 hops in 1 06:22:14: 172.12.123.0/24 -> 0.0.0.0 hops in 1 06:22:14: RIP: Send v2 upgrade to 224.0.0.9 on Loopback0 (1.1.1.1) 06:22:14: 2.2.2.2/32 -> 0.0.0.0, metric 3, Day 0 06:22:14: 3.3.3.3/32 -> 0.0.0.0, metric 2, Day 0 06:22:14: 172.12.23.0/24 -> 0.0.0.0, metric 2, Day 0 06:22:14: 172.12.123.0/24 -> 0.0.0.0, metric 1, Day 0 06:22:14: RIP: Send v2 upgrade to 224.0.0.9 via Serial0 (172.12.123.1) Cisco CCNA certification depends on to note how these details, and there is no better way to learn this information than by working on real Cisco routers and switches. Whether you rack rental or purchase of online time uses Cisco routers and switches, real-time and debug configurations are the way to CCNA certification exam success!
Perhaps you already know that it is possible to obtain a domain name free. However, you always wondered how a country can afford to give their domain names for free? For a country that only assign their domain names, instead of charging for them? 1. Free Domain Names of Dot TK You can get a free top-level domain name of Dot TK (www.dot.tk). According to his site, "Dot TK is a joint venture of the Government of Tokelau, it& 39;s communication company Teletok and Taloha, Inc., a private company owned. The Government of Tokelau has been appointed Taloha, Inc. As the exclusive registration entity. " Of course, for free. Tk areas, the ownership remains with Dot TK. That means you can not sell it. As well, there are other restrictions and disadvantages of free. Tk areas, including: — You can only register a maximum of three domain names free; — You need 25 visitors within a period of ninety days; — You must have some existing content on the Web, so that his name dot tk may be addressed to him, and — Dot TK uses frames to display your site. This being the case, you may have problems with the navigation (or bookmarking find specific pages) and search engine friendliness. For companies serious use, you may want to pay the nominal cost of a domain name. 2. So they offer free domain names? Still, it is free. Why do they do this when they could make money from the sale of domain names? According to its website: "Why does give free Dot TK domain names? We believe that the Internet was supposed to be & 39;Free& 39;. Meaning without charges, payments or favors expected return. " 3. How can they afford to give free domain names? This logic leads us to our next question: How can they afford to give free domain names? Dot TK is money paid from domain names, including some special and brand names. To help support Dot TK, you can optionally have an ad appears on your site. Thus, they receive some advertising revenue from this. However, the big money would be the sponsorship by large corporations. 4. Other names free top-level domain Incidentally, this is not the only ccTLD (country code Top-Level Domain), which gives some domain names for free. As just one example, cg is the ccTLD for the Republic of Congo. Each of its citizens and legal residents are allowed a free. Cg domain name. 5. Free subdomain names Moreover, subdomain names are also available for free. For example, eu.org says in its website that its goal "is to provide free registration subdomain to users or nonprofit organizations who can not afford the outrageous fees demanded by some NICs, especially in Europe." As well, nr ccTLD is the name for the Republic of Nauru. You can have a name of free subdomain co.nr. Thus, your domain name could be something like yourcompany.co.nr. Why is it that countries give free domain names? They want their citizens and others to enjoy the benefits of using a domain name without cost to be a problem. It can also be a promotional method to get the word out about their ccTLD. How do they afford to give free domain names? Advertising revenue and the sale of paid areas are two forms of financing free domain names.
