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Spanning-tree protocol Notes with Interview Questions

<b>spanning-tree protocol (STP)</b><p><b>What is Spanning tree ?</b><br>spanning-tree protocol is a protocol used in switching network to create a loop-free topology. STP …

The Cisco Three-Layered Hierarchical Model

<b>The Cisco Three-Layered Hierarchical Model</b><p>Cisco has defined a hierarchical model which simplifies the task of building a reliable, scalable, and less …

Difference between Linkstate and distance vector protocols

Dynamic Routing<p>Dynamic routing protocols can dynamically respond to changes in the network. The routing protocol is configured on each router and the …

How to configure Static Routes,Default routes,Floating static routes

<b>Static Routes</b><p>A static routing table is created, maintained, and updated by a network administrator, manually. A static route to every network must be …

What is Poison Reverse and split-horizon?

<b>Poison Reverse</b> <br>Poison reverse is a method used in RIP.When path information become invalid,routers will not immediately remove them form the routing …

OSPF DR and BDR election

OSPF elect a Designated Router (DR) for each multi- access networks, accessed via multicast address 224.0.0.6. For redundancy purposes, a Backup …

OSPF neighbors

In OSPF, routers have to become neighbors first before exchanging link- state advertisements (LSA).After configuring OSPF on routers it will start …

Basic Notes on OSPF (Open Shortest Path First)

<b>OSPF (Open Shortest Path First)</b><p>OSPF is a standardized Link-State routing protocol, designed to scale efficiently to support larger networks.<p><b>OSPF</b> …

Short note on RIP with Interview Questions

<b>Short note made for quick study for RIP</b><p>The Routing Information Protocol (RIP) is a distance-vector routing protocol<br>• RIP takes the hop count as a …

OSI Reference model notes with interview questions

<b>Layer</b><p><b>Description</b><p><b>Examples</b><p><b>7.<br>Application</b><p>Provides interface for users to communicate with applications.Responsible for initiating or services the request.<p>…

CCNA / CCNP Interview questions

<b>Basic Interview Questions</b><p>What is Routing?<br>• What is Protocol?<br>• Explain difference between Router,Switch and Hub ?<br>• What is the difference between OSI and …

Notes on Administrative Distance and Metric

Routing protocols uses <b>metrics</b> for calculating best path for a remote network. Distance vector routing protocols use “distance” (usually hop-count) as …

VTP explained with Interview Questions

VLAN Trunking Protocol (VTP) is <b>a Cisco proprietary protocol</b> that carries VLAN information to all the switches in a VTP domain.VTP reduces …

Wireless Networking Interview Questions

We know about wired (LAN) and wireless (WLANs) networks.Whats the main difference between them ? Wired networks are connected to each other using …

Subnetting made easy

<b>What is “subnetting”?</b><p>“Subnetting” means we borrow some bits from the Host part to add to the Network part. This allows us to have more networks than …

Basic Security Best Practices for networking

· <b>Secure Location:</b> Be sure to locate your Cisco routers and switches in a secure location — a locked room where limited access is permitted.<p>· <b>Disable</b> …

Basic cisco Troubleshooting Commands

<b>Command(s)</b><p><b>Result</b><p>show running-config<p>Displays the running configuration stored in VRAM.<p>show startup-config<p>Displays the startup configuration stored in …

Basics : Network Cabling

<b>Straight-through cable</b>: A straight-through cable is used to connect dissimilar devices together. Scenarios that use straight-through cables are …

Basics: Network services

<b>Network services</b><p><b>DHCP:</b> The DHCP service is responsible for assigning IP addresses to hosts on the network. When a client boots up, it sends a DHCP …