CCNP ONT Official Exam Certification Guide
by Amir S. Ranjbar - CCIE No. 8669
Publisher: Cisco Press
Pub Date: May 21, 2007
Print ISBN-10: 1-58720-176-3
Print ISBN-13: 978-1-58720-176-9
This official study guide helps you master all the topics on the CCNP ONT exam, including
It is important to note that the ip helper-address command does not just forward DHCP requests. In fact, although you can configure it to forward any UDP broadcast you want, by default it will forward UDP broadcast packets for several different UDP ports to the specified address. In some cases, this unwanted traffic can cause problems on the network or DHCP server. Read the rest of this entry »
The traditional role of routers in DHCP has been simply to act as a proxy device.DHCP proxy function is still the most common for routers.
Initial DHCP request comes from a client that typically doesn’t have an IP address, it must find the server using a Layer 2 broadcast. So, if the router was not able to function as a proxy for these broadcasts, it would be necessary to put a DHCP server on every network segment. Read the rest of this entry »
It is entirely focused on security in today’s networks, and this is reflected in the ways of Cisco certification. Cisco offers a security track and CCIE Cisco Certified Security Professional (CPSC) Intermediate certification, but there is no real equivalent to the CCNA on the security side.
One security certifications most popular partner is the specialist certification Cisco VPN. This track consists of two examinations of a securing Cisco Network Devices (SND 642-551) and a review Cisco Secure Virtual Private Networks (CSVPN, 642-511) review. For the Cisco VPN Specialist exam, you must hold a valid CCNA certification. Read the rest of this entry »
Like any other certification in the field of information technology, Cisco certification is one of many IT professionals to achieve Crave. Having a certification or be certified in your field of expertise could greatly help in your career.
How to be a Cisco Certified? A review of certification CISCO is specially designed for those who wanted to be CISCO certified. The review gave the candidates is one of the toughest tests a computer professional should be spent. CISCO practice focuses on network hardware and equipment that is the reason for its program of certification is oriented toward the field of information technology. Before the examinations provided by Cisco, it is necessary to understand the different levels of its program of certification. It is important for you to decide what level of certification you want to have Cisco in order to easily obtain a credential and becoming one of the CISCO certified. Read the rest of this entry »
Cisco Systems was founded in 1984 by a married couple named Len and Sandy Lerner Bosacki. They were computer engineers working at Stanford University near San Francisco, California. The name of Cisco, which was originally spelled with a small c, was taken to San Francisco.
This is exactly the right product at the right time because it allowed previously incompatible computers to communicate with each other. The Cisco has contributed to the creation and growth of the Internet. The modification of the standard Internet Protocol (IP) reduces drastically the need for a multi-protocol router, but this time the company was well established and able to diversify into other networking products. Read the rest of this entry »
Hardware Problems
Hardware problems usually refer to the interface drivers; modules of RAM, processor router, an interface cable connected improperly, and even the fan. If the fan fails, the router will heat up and will reboot (the router does not have to temperatures above 37 degrees). In cases where the router is stopped abnormally, you can use the show stacks command to retrieve the error messages that have been saved in the ROM monitor at the time of detection. Cisco may use the information provided by this command to help you determine the cause of the error. It is also good practice to protect the router against falls and peak power by a UPS.
A failure of the physical components of the router, there may be situations where the router does not have enough RAM or processor to handle the traffic of packets. One of the methods used by managers to identify bottlenecks is to use some type of packet network management software. CiscoWorks is an example of a package of network management software that provides several tools to monitor network interconnections and solve possible problems that may arise. Read the rest of this entry »
IP System Boundaries
The IP numbers is a basic part of the system TCP / IP, which is used by the network of computers known as the Internet. The IP number is a 32-bit binary number that identifies precisely and only the location of each computer on the Internet. For example, 207.46.197.102 is an IP number that identifies a server microsoft.com
This system, in use for over 20 years (the current IP v4 data, 1981), is exhausted. Depleted by a growing problem, as it is expected to continue the current pace of growth in the near future there would be enough combinations of different IP numbers for each device connected to the network.
Along with this problem are others, like a poor (or developing) data routing, forecasting the next connection to the Internet of a large number of devices (not necessarily computer) and desire to incorporate new features. These factors are those that have moved to designing a change of IP protocol, called the current IP v4 to IP v6 future. Read the rest of this entry »
Introduction
This is an example of configuring a switch with three VLANs (VLAN1 default name VLAN10 VLAN20 faculty and student name). When you configure VLANs, you must know first that they are on separate broadcast domains, i.e., are separated from each network and not simply data-link, as if all hosts on different VLANs to be on a different interface a router, in fact, each VLAN is a network address or subnet different. So, for example, all hosts connected to VLAN10 faculty can communicate with each other, but not with the hosts VLAN20 student or with hosts connected to VLAN1.
Warning: because VLANs can communicate, you must put a router in such a way that routing protocols to handle communication between different VLANs. Read the rest of this entry »
Introduction
Set the basic configuration of a router is simply activate the various interfaces of router and configure the software for routing and routing protocols. There are different ways of carrying out the configuration of the router, but to establish the basic configuration of a misconfigured router, we recommend using the console port.
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