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Serial Connections and HDLC

Introduction we will discuss serial links and the physical connections we use. We will then explore the default encapsulation on CISCO routers which is HDLC and finally discuss how to troubleshoot a serial connection. How serial communications work When communicating…
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Cisco RIP PROTOCOL

CONFIGURE A SIMPLE TOPOLOGY ON THE PACKET TRACER AS SHOWN BELOW The Routing Information Protocol (RIP) is one of the oldest distance-vector routing protocols which employ the hop count as a routing metric. R1 In order to apply protocol RIP,…
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What’s New in Cisco CCNA v3.0?

Cisco’s most popular certification, the Cisco Certified Network Associate (CCNA), is undergoing an overhaul by upgrading from CCNA v2.0 to CCNA v3.0. That means new exams for ICND1, ICND2, and CCNA, and that also means new training courses. According to…
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Cisco Certification: 5 Tips For Success

Earning a Cisco certification can boost your IT career, but requires careful planning and training. Here are five tips to help guide your certification strategy. Whether you’re looking to advance your career, get your foot in the door, or considering…
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Configure Cisco Router as DHCP Relay Agent

A DHCP relay agent is any host or IP router that forwards DHCP packets between clients and servers. Note :  Follow below given Picture ==== note  :   click on image to view Here we have  a  DHCP Server   IP  address  (192.168.2.254) Router…
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Cisco Network Security

1. What is a Firewall? A firewall is a set of rules and programs , located at a network gateway server, that protects the resources of a private network from users from other networks. It is a network security system…
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Basics : Common Networking terms

Access Point:Access points are way stations in a wireless LAN that are connected to an Ethernet hub or server. Users can roam within the range of access points and their wireless device connections are passed from one access point to…
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The Cisco Three-Layered Hierarchical Model

The Cisco Three-Layered Hierarchical Model Cisco has defined a hierarchical model which simplifies the task of building a reliable, scalable, and less expensive hierarchical internetwork because rather than focusing on packet construction, it focuses on the three functional areas, or…
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What is the difference between the ip default-gateway, ip default-network, and ip route 0.0.0.0/0 commands?

Question: What is the difference between the ip default-gateway, ip default-network, and ip route 0.0.0.0/0 commands? A. The ip default-gateway command is used when IP routing is disabled on the router. This command serves non-routing network device that need to reach…
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