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Open Systems Interconnection(OSI) Model The Open Systems Interconnection (OSI) model began as a reference ...
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1 Principle for selecting a routing protocol With the rapid development of Internet, TCP/IP has been in mainstream protocol. Ma...
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IPSEC vs GRE A computer network consists of a group of two or more computers or other electronic devices that are connected to each o...
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CCNA INTERVIEW Q&A Q. What is a router? A. A router is a device that connects more than one physical network, or segments of a...
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Host Stand By router Protocol: when an active router in the group fails. HSRP allows building resiliency in the network gateways wherein ...
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Border Gateway Protocol (BGP) How BGP works . When a BGP router first comes up on the Internet, either for the first time or after be...
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Firewall A firewall is a device or set of devices designed to permit or deny network transmissions based upon a set of rules and is f...
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Configuring your Cisco Router If you have just turned on the router, it will be completely unconfigured. If it is already configured, y...
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