Posts tagged “ICND2 Study Guide”
What you need to know about VLAN Trunks for the CCNA Exam
Understanding how VLAN Trunks work is essential to you passing the CCNA Exam. In this post I’m going to talk about VLAN Encapsulation with 802.1Q, and all the details about the VLAN Trunking Protocol VTP.
Trunks are needed in switching networks with VLANs in order for hosts within different VLANs to still communicate with each other. When you create a VLAN you are supposed to maintain a 1 to 1 ratio with the number of subnets you have. Which means if you have 4 VLANs you should also have 4 subnets. Since each VLAN is in a different subnet they are in different networks and for devices in different networks to communicate with one another a Layer 3 device such as a router is needed. Interfaces on switches by default can only be assigned to one VLAN at a time. So, in order for you to send data about 4 different VLANs configured on a switch to a router you need to configure an interface to be a trunk link. Trunk links are able to send data for many different VLANs at one time. In order to keep them from getting mixed up they tag the switch frame.
What you need to know about VLANs for the CCNA Exam
VLANs are another important topic on the CCNA Exam that you will need to become very familiar with. VLAN stands for Virtual Local Area Network which means that you can now segment a LAN logically at the Layer 2 level rather than physically based on geographic location.
Benefits of VLANs
Having this capacity to logically break up network segments VLANs provide many benefits. They are able to break up broadcast domains, keep network failures from affecting the entire network, increase security, and reduce administrative overhead.
What you should know about PPP for the CCNA Exam
Point-to-Point Protocol or PPP for short is a layer 2 protocol for sending layer 3 packets over synchronous (ISDN) and asynchronous (dial-up) WAN links. Just like for every topic on the CCNA Exam there are many new terms that you will need to learn and understand about PPP. So, lets begin! Link Control Protocol The [...]
What you should know about Frame Relay for the CCNA Exam
Frame Relay is a protocol used to establish WAN connection between remote locations. Frame Relay operates at Layers 1 and 2 of the OSI Model. There are many details to Frame Relay that you will need to understand in order to be prepared for the CCNA Exam and the ICND2 Exam. Virtual Circuits Frame Relay [...]
7 Great Cisco Networking Engineers to Learn From
The CCIE has been around since August 1993 and a lot has happened within the last 17 years. One big thing that has changed is that now there is actual curriculum to study and courses that you can take. That just didn’t exist 17 years ago. There was no
Bridging The Gap between IPv4 and IPv6
Many networks these days are still using IPv4 and are not yet ready for IPv6 and so in this article I wanted to talk about the necessary steps to start the transition from IPv4 to IPv6 addressing. A while back I wrote a general introduction to IPv6 addressing that you should look at again to get a little bit more background.
How to Properly Use Wildcard Masks
You will need to become familiar with how wildcard masks work in order to properly configure many different Cisco IOS commands. Mostly you will encounter wildcard masks with access control lists and when configuring the dynamic routing protocol OSPF. ACL’s are also used when configuring NAT and PAT settings. Because wildcard masks come up often they are a very important topic to understand for your ICND2 and CCNA Exam.
Managing Traffic With Access Control Lists
Access Control Lists are very important to ensure that network traffic is well managed and under control. Just like a toll both checks every car before it proceeds on the highway, Access Control Lists can be set up on a router to check each and every packet as it comes through and block unwanted traffic.
A proper Access Control List configuration will increase security and ensure proper network speeds for time sensitive traffic like voice calls or video conferences.
Introduction to EIGRP
EIGRP stands for Enhanced Interior Gateway Routing Protocol. It is considered a hybrid routing protocol because it uses features from both link-state and distance vector routing protocols.
EIGRP is a Cisco proprietary routing protocol. Meaning that it can only run on Cisco routers.
The Spanning Tree Protocol Explained
My last post talked about many details of the Spanning Tree Protocol. While I did my best to explain how it works using carefully selected words, sometimes videos are just better.