CCNA: Chapter 3-8 Password Recovery on a Cisco Router

10. September 2016 Cisco, Study Guides 0
CCNA: Chapter  3-8 Password Recovery on a Cisco Router
While working with IOS based devices, it is not uncommon to forget passwords and lock yourself out of the devices. While password recovery procedures differ from device to device, most Cisco routers have a similar process for recovering the password. Recovering passwords for Cisco switches is a little different and not covered in CCNA, so ...

CCNA: Chapter 3-6 Configuring DNS & DHCP

10. September 2016 Cisco, Study Guides 0
CCNA: Chapter 3-6 Configuring DNS & DHCP
Resolving Names on IOS When working with advanced configuration such as routing and access lists on IOS based devices, you will often refer to other devices. There are two ways to refer to another device – using the IP address or hostnames. Remembering and using IP address of various devices is difficult and often cumbersome ...

CCNA: Chapter 3-4 Configuring Router Interfaces

10. September 2016 Cisco, Study Guides 0
CCNA: Chapter 3-4 Configuring Router Interfaces
While configuring interfaces of a switch are covered in Chapter 6, configuring the interfaces of a router is one of the basic things that you should know before forging further ahead. This is because unless the router is connected to the network, there isn’t much it can do. Configuring the interfaces is easy and usually ...

CCNA: Chapter 3-2 Using the Command-Line Interface (CLI)

10. September 2016 Cisco, Study Guides 0
CCNA: Chapter 3-2 Using the Command-Line Interface (CLI)
Once IOS has finished loading up, it will ask you to press Return to continue. While waiting for you to press return, it will display the status of every interface as shown below. Press RETURN to get started! *Mar  1 00:09:01.271: %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to administratively down *Mar  1 00:09:01.583: %LINK-5-CHANGED: Interface FastEthernet0/1, ...

CCNA: Chapter 2-6 Troubleshooting IP Addressing

10. September 2016 Cisco, Study Guides 0
CCNA: Chapter 2-6 Troubleshooting IP Addressing
As you know by now, IP Addressing is an integral part of networking and given the complexity of addressing and subnetting, it is common to have IP addressing errors in the network. So it is essential for you to be able to troubleshoot common problems related to IP Addressing. Before troubleshooting a network, you have ...

CCNA: Chapter 2-5 Route Summarization

10. September 2016 Cisco, Study Guides 0
CCNA: Chapter 2-5 Route Summarization
You already know from the previous chapter that routers function by creating a table of all networks it knows about. This table is called the routing table and routers use routing protocols to tell each other about the networks they know of. As networks increase, so do the number of entries in a routing table. ...

CCNA: Chapter 2-3 Subnetting

10. September 2016 Cisco, Study Guides 0
CCNA: Chapter 2-3 Subnetting
In case of class A and B IP addresses, each of them provides for a large number of hosts. For class A, the total numbers of hosts available are 224-2 or 16,777,216 hosts (class A has 24 bits available for host component and each bit can have two values – 0 and 1. Out of ...

CCNA: Chapter 2-2 Private and Public IP addresses

10. September 2016 Cisco, Study Guides 0
CCNA: Chapter 2-2 Private and Public IP addresses
As you know already, every host on a network requires a unique IP address. This is easily manageable in a small network but not a network as large as the Internet. The Internet Assigned Numbers Authority (IANA) is responsible for managing and distributing IP addresses. The IANA has created 5 address registrars in five locations ...

CCNA: Chapter 1-7 Summary

10. September 2016 Cisco, Study Guides 0
CCNA: Chapter 1-7 Summary
Though this chapter was long, it helped lay the foundation of your CCNA networking knowledge. The importance of understanding every topic in this chapter cannot be stressed enough. I would strongly suggest going through the chapter again to reinforce the basics. The chapter started off with the importance of networks, basic network devices and network ...

CCNA: Chapter 1-6 Cisco 3 Layer Model

10. September 2016 Cisco, Study Guides 0
CCNA: Chapter 1-6 Cisco 3 Layer Model
In a large organization it is common to see large and complicated networks consisting of many locations, devices, services, and protocols. It can be cumbersome to manage and troubleshoot such networks. In addition to that as technologies evolve, the network has to evolve also. Making changes to a complex network is often difficult. Cisco with ...

CCNA: Chapter 1-5 Ethernet Technologies and Cabling

07. September 2016 Cisco, Study Guides 0
CCNA: Chapter  1-5 Ethernet Technologies and Cabling
Ethernet in the term used for a family of standards that define the Network Access layer of the most common type of LAN used today. The various standards differ in terms of speeds supported, cable types and the length of cables. The Institute of Electrical and Electronics Engineers (IEEE) is responsible for defining the various ...

CCNA: Chapter 1-4 TCP/IP Model

07. September 2016 Cisco, Study Guides 0
CCNA: Chapter 1-4 TCP/IP Model
As mentioned earlier, the OSI reference model and the TCP/IP model are two open standard networking models that are very similar.  However, the latter has found more acceptance today and the TCP/IP protocol suite is more commonly used. Just like the OSI reference model, the TCP/IP model takes a layered approach. In this section we ...

CCNA: Chapter 1-3 OSI Reference Model

07. September 2016 Cisco, Study Guides 0
CCNA: Chapter 1-3 OSI Reference Model
As discussed earlier, the OSI model was created to promote communication between devices of various vendors. It also promotes communication between disparate hosts such as hosts using different operating platforms (Windows, OSX, Linux, etc.). Remember that you are very unlikely to ever work on a system that uses protocols conforming to the OSI reference model.  ...