The most positive thing that I can say about 2002 is that I am glad it is over. While I cannot complain about the past year, too many people I know were unemployed or just barely getting by. The IT industry did not have its best year. Layoffs in the IT sector reached somewhere around 1 million, and IT...
It's been coming for some time now. I can remember hearing about IPv6 ages ago. Last week in an article I read on the web, Cisco announced that their 12000 series routers are being used on the first native IPv6 Internet network in Europe. Official support for IPv6 began with IOS version 12.2(1)T. It...
I am of the opinion that all routers are female. Must be. Look at the relatively high male to female tech ratio in IT. Gotta be the routers. Obviously, I could be wrong, but a router's anatomy is interesting all the same. Let's take a closer look.The first thing you should know about a router is she...
Over the last year, the IT industry has changed dramatically. The Cisco certification landscape has also undergone huge changes. In this week's newsletter, I will be writing about the current Cisco career certifications, and whether or not they are still valuable.
Imagine for a second that you’re a frame of data (sure this is unlikely, but still). You’ve been packaged slowly down the OSI layers, and are now finally ready to take that big step into the wide world of the Ethernet. With its crazy and often chaotic flow of data, is there any guarantee that you’ll...
Cramsession gets thousands of visitors that are considering career changes within the IT certification world. Many of the first questions asked have to do with the cost of new courses or the degree of difficulty of the exam but one of the most consideration that is often overlooked is the economics of...
The much undersung Cisco Networking Academy Program brings CCNA training to high schools (and even some middle schools) in over 40 of the 50 U.S. states, according to the program's Web pages. In early November, I had the good fortune to interview Gene Longo, director of the Cisco Networking Academy Program...
Some exam study guides would have you believe there is only one way to send data through a network: packet switching. Fact is, there’s at least one other way, circuit switching.While the majority of switched networks today get data across the network through packet switching, the concept of circuit switching...
The much undersung Cisco Networking Academy Program brings CCNA training to high schools (and even some middle schools) in over 40 of the 50 U.S. states, according to the program's Web pages. In early November, I had the good fortune to interview Gene Longo, director of the Cisco Networking Academy Program...
For a while now, Cisco certified professionals have had to re-up their credentials every two or three years, depending on which credentials they hold. For associate- and professional-level credentials, this happens every three years; for CCIE and Qualified Specialist credentials, this happens every two...
Cisco added a new member to its lineup of IP Telephony certifications in its Cisco Qualified Specialist program. Called the Cisco Unified Communications Design Specialist credential, this program concentrates on the growing convergence between IP networks, telephony, and messaging services—particularly...
To enable back-to-back communication over the Serial interfaces you have to perform a few tasks. These tasks are fairly straight forward as soon as you fathom things out. The first thing to do is to ascertain which is the DTE and which is the DCE interface. This can be done by physically looking at the...
The Oracle Net software is comprised of certain communication layers (programs), collectively known as a stack, which enable clients and database servers to share, modify, and manipulate data. The stack architecture is based on the Open Systems Interconnection (OSI) model.On the client side, from top...
The Recovery Manager (RMAN) provides the CONFIGURE RETENTION POLICY command to create a persistent and automatic backup retention policy for controlling how long backups and copies should be retained. When a backup retention policy is in effect, RMAN considers the backups and copies of data files and...
An RMAN channel represents one stream of data to a device type and corresponds to one server session. It establishes a connection from the RMAN executable to a target database instance by starting a new server session on the instance. The server session then performs the backup, restore, and recovery...
A naming method is a names resolution method that a client application uses to resolve a connect identifier to a connect descriptor when attempting to connect to a database service.
Users initiate a connection request to a database service by providing a connect string with the CONNECT command on the...
This test requires a thorough knowledge of administrative tasks for managing the database for optimal performance. The candidate appearing in this test should have a sound knowledge of various tools available in Oracle9i for managing different issues in the database. This includes identifying contentions...
Materialized views can be created either through the CREATE MATERIALIZED VIEW statement or the Oracle Enterprise Manager (OEM). The CREATE MATERIALIZED VIEW statement can also be used for populating the materialized views. A materialized view can be derived from an existing user-defined materialized...
The Database Resource Manager (DRM) is a tool, which handles the resource allocation issues in a more efficient way than can probably be done by the operating system itself. Such issues include equal distribution of resources by the operating system to every active process, inability of the operating...
In order to start using the AUTOTRACE utility, some initial setup operations must be performed. These operations are stated below:
Every user willing to use this utility must be granted the PLUSTRACE role.A PLAN_TABLE must be created in the user schema.In order to create and grant the PLUSTRACE role...