May | 2013 | Josh Gahan

Benefits of Switching

May 31, 2013

Switch ports connected to a single device and microsegment the LAN, providing dedicated bandwidth to that single device.
Switches allow multiple simultaneous conversations between devices on different ports
Switch ports connected to a single device support full duplex, in effect doubling the amount of bandwidth available to the device.
Switches support rate adaptation, which means that devices that use different ethernet speeds can communicate through the switch (HUBS CANNOT)

Leave a Comment » | Networking, Switches | Tagged: adaptation, benefits of switching, ccent, ccna exam, cisco, cisco networking, cisco switches, full duplex, icnd1, microsegment, Microsegmentation, segment, switch ports, switches, switching | Permalink
Posted by Josh Gahan

CDP Video Tutorial

May 31, 2013

A quick run through the CDP commands to help you map a network, HD is available for this video guys.

[youtube=http://youtu.be/nzGconvPllo]

Leave a Comment » | Networking, Protocols, Videos | Tagged: ccent, ccna, cdp, cisco, cisco discovery protocol, cisco ios, cisco networking, cli, icnd1, iOS, networking, nvram, router, show cdp, switch | Permalink
Posted by Josh Gahan

Three most Common Types of Attacks

May 30, 2013

Denial of Service (DoS)

Erasers try to harm the host, destroying hardware and files
Crashers cause hosts to fail or no longer allow hosts to connect to the network
Flooders flood the network with packets to make the network unusable.

Reconnaissance Attacks

The goal is to gather information to perform an access attack and causing harm can be a side effect.

Access Attack

An attempt to steal data typically for some type of financial gain.

*This topic will definitely be asked in the exam room, make note and have this stuff drilled in

Leave a Comment » | Networking, Security | Tagged: access attack, ccent, ccent exam, ccna, ccna exam, cisco, denial of service, dos, icnd1, networking, recon attack, reconnaissance attack, router, security, switches, types of attacks | Permalink
Posted by Josh Gahan

VLANS…Why use them ?

May 30, 2013

There are many motivations for using a VLAN:

To create more flexible designs that group users by department or by groups that work together, instead of by physical location.
To segment devices into smaller LANS (Broadcast Domains) to reduce overhead caused to each host in the VLAN
To reduce the workload for STP by limiting a VLAN to a single access switch
To separate traffic sent by an IP phone from traffic sent by PC’s connected to the phones

Leave a Comment » | Networking, Switches | Tagged: ccent. icnd1. 640-822, ccna, lan, switches, virtual lan, vlan, vlans, why use a vlan | Permalink
Posted by Josh Gahan

Well on the 23rd i did it guys i got myself CCENT certified, the certification for me should arrive by email within 24hours and I’m so stoked. I have alot more content to put up here to help you guys along but there will be a quiet period for the next few weeks, I’m moving house and alot of my time is going to be focused on that. Don’t worry there are plenty of resources out there to help you and don’t forget to check out my youtube and follow me on twitter. Keep at it guys and goodluck