July 2009 ~ My Daily Works Archive

In some cases you may be allocated a block of IP addresses smaller than a /24. This is referred to as a Classless Delegation and is explained in technical detail in RFC 2317. For example, if your ISP allocated the block 192.168.5.224/27 (the 32 IP addresses from 192.168.5.224 to 192.168.5.255), the reverse DNS for this zone would be served out of a zone named 224-27.5.168.192.in-addr.arpa...

Juniper Fast Track Program

14:09:00 ITExam_Blog No comments

Fast Track Program Details The Juniper Networks Certification Fast Track program is specifically designed for experienced networking professionals to become certified in Juniper Networks JUNOS software-at substantial savings! Networking professionals who achieve multiple certifications are in great demand, commanding higher salaries and adding more value to high-end enterprises. Because...

Linux find the memory used by a program / process

13:30:00 ITExam_Blog No comments

You can find the memory used by a program (process) by looking into /proc directory or using standard command such as ps or top. However, you must calculate all memory usage by hand i.e. add Shared Memory + mapped file + total virtual memory size of the process + Resident Set Size + non-swapped physical memory used by process. So how do you find the memory used by a process or program under Linux?...

DNS

DNS Caching

17:35:00 ITExam_Blog No comments

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DNS

Full reverse (IN-ADDR.ARPA) zones

17:27:00 ITExam_Blog 13 comments

Reverse DNS records (PTR) are generally served out of a reverse zone. For instance, if you have been assigned the block of addresses 192.168.5/24 (the 256 IP addresses from 192.168.5.0 to 192.168.5.255), the reverse DNS for this zone would be served out of a zone named 5.168.192.in-addr.arpa In such a case, you would setup Custom DNS for that zone, selecting the Expert interface option (PTR...

DNS

PTR records within a forward zone

17:25:00 ITExam_Blog No comments

In some cases your ISP may not want to create NS records for your allocation, especially if the ISP has assigned a large number of very small blocks to individual customers. In such a case, they can still allow you to control the reverse by using the method discussed in section 5.2 "Alternative naming conventions" of RFC 2317. Let's say, for example that your ISP has provided you with 4 IP addresses,...

DNS

What is Reverse DNS?

17:23:00 ITExam_Blog No comments

Reverse DNS provide mappings from IP addresses to host names. For more info on this, see the Reverse DNS KB article. Reverse DNS should not be created in Custom DNS. Instead, it is usually best to contact your ISP and request DNS records to be created for your IP. Also, only in rare circumstances is it necessary to delegate individual or few amounts of IP addresses to DynDNS.c...

Cisco Completes Acquisition of Pure Networks

14:13:00 ITExam_Blog No comments

SAN JOSE, Calif. - August 12, 2008 - Cisco today announced that it has completed the purchase of Seattle-based Pure Networks, a leader in home-networking-management software and tools. Pure Networks’ solutions allow users to easily set up and manage a home network and connect a range of devices, applications and services. The acquisition of Pure Networks provides Cisco with a fully integrated...

VTP (VLAN Trunking Protocol) configuration

14:12:00 ITExam_Blog No comments

Things to remember when setting up VTP: VTP Modes: Server - This is the default setting for a switch. You can create, edit and remove VLANS for the VTP domain.Client - A client is not able to create, edit or delete VLANS, but it will synchronize with the VTP server.Transparent - A switch in this mode will not advertise it’s VLANS, nor will it synchronize with the VTP server. However, it will...

Juniper

Juniper Networks Announces Release of Instructional Guide “JUNOS for Dummies”

14:08:00 ITExam_Blog 1 comment

A Practical Approach to Learning and Using JUNOS Software to Manage High-Performance Networks SUNNYVALE, Calif., October 6, 2008 — Juniper Networks, Inc. (NASDAQ: JNPR), the leader in high-performance networking, today announced the recent release of “JUNOS® for Dummies,” (Wiley Publishing, Inc; ISBN: 9780470277966; $29.99) a practical guide to JUNOS software, the trusted network operating system...

Cisco, Switching

Initial / default login name and password on EX-series switches

14:07:00 ITExam_Blog 102 comments

Synopsis When customers receive a new EX switch and power it on, it requests a login name and password. For first-time JUNOS-EX users this could be confusing as there is no password information included. This article provides the default user ID and password information. Solution The initial login name and password on EX-series switches: login: rootpassword: The device is shipped with no...

Cisco

NASA, Cisco Partnership on Climate Change Monitoring Platform

14:07:00 ITExam_Blog No comments

WASHINGTON - March 3, 2009 - NASA and Cisco Inc. announced Tuesday a partnership to develop an online collaborative global monitoring platform called the “Planetary Skin” to capture, collect, analyze and report data on environmental conditions around the world. Under the terms of a Space Act Agreement, NASA and Cisco will work together to develop the Planetary Skin as an online collaborative platform...

Cisco

Cisco Announces Executive Transition for Worldwide Operations

14:06:00 ITExam_Blog 1 comment

SAN JOSE, Calif. - February 26, 2009 - Cisco, the worldwide leader in networking that transforms how people connect, communicate and collaborate, today announced that Robert Lloyd, 52, has been named Executive Vice President (EVP) of Worldwide Operations, effective April 26, 2009. As the direct result of a long-range succession strategy, Lloyd succeeds Richard Justice, 59, who is stepping...

Linux, Operating System

NTP Server and Client Configuration in debian

15:54:00 ITExam_Blog No comments

he Network Time Protocol (NTP) is a protocol for synchronizing the clocks of computer systems over packet-switched, variable-latency data networks. NTP uses UDP port 123 as its transport layer. It is designed particularly to resist the effects of variable latency (Jitter). Using NTP is a great way to keep your system clock set correctly. It works by contacting...

Database, MySQL

Shell Script To Back Up All MySQL Databases, Each Table In An Individual File And Upload To Remote FTP

01:06:00 ITExam_Blog No comments

Cisco, COD

Link-Layer Connectivity Class-on-Demand

02:14:00 ITExam_Blog 2 comments

Link-Layer Connectivity Class-on-Demand Outline Each VoD attempts to address a specific configuration task related to link-layer technologies deployed using the Cisco IOS and examine all possible options related to the specific task. This "options analysis" learning and problem solving approach is often exhibited in the form of options analysis decision tree diagrams. Several of these decision trees...

My Daily Works Archive

Classless IN-ADDR.ARPA delegation