The iPhone Helps Users Get the Message

It used to be that cell phones were used just for
making calls, but that isn’t the case anymore. When
people purchase a cell phone, they want to not only be
able to talk on the phone to their friends, they also
want to be able to talk to their friends with chat as
well.


One of the biggest problems that people have when they
are texting someone with a cell phone is that they
find themselves making a lot of mistakes due to the
keypads on their cell phones. But when you are texting
with an Apple iPhone, you will find that your mistakes
and typos seem to disappear like magic.

The reason for this is that the Apple iPhone is
equipped with something called an SMS application,
including a Qwerty soft keyboard that is highly
intelligent.

What this does is that it seeks out the typos that you
make when you are texting someone and fixes them for
you. This saves you a lot of time, because you don’t
have to worry about going back and fixing them
yourself.

Another feature that the iPhone has when it comes to
messaging that teenagers will like is the ability to
send out a text message to more than one person at
once. This is really handy if you are planning a get
together or an important meeting.

The Apple iPhone goes above and beyond what customers
are looking for when it comes to texting capability,
and helps them to do things quickly and efficiently.

3 Tips for Sending Special Messages

Staying in touch with family and friends has never been easier with the speed and efficiency of today's technology. We live in a world of e-mail, text and instant messages and mobile conversations.

While such options make it easy to stay in touch, these technologies have also lessened the emotional aspect of our communications.

Here are a few suggestions on how to use technology to stay close to loved ones and, at the same time, bring back the personal element in your communications.

* Send a personal DVD message. Now you can give the gift of vivid, colorful memories by creating personalized DVD messages for your friends and family. It's a fast, easy and fun way to stay in touch.

Can't make it to your high school reunion? Use a Sony DVD Handycam camcorder to record a special message to old classmates. You can even get special Sony DVD mail envelopes to share your discs.

Encourage friends and family to reciprocate. When you receive their DVDs, just pop them into your player as you would a movie.

* Make a Webcam chat date. A picture tells a thousand words, but real-time video speaks volumes. While nothing can replace an in-person conversation, you can get awfully close to the real thing with a Webcam chat.

Gather your loved ones in front of the Webcam to talk, view photos or share advice.

First time carving the turkey? Get Dad on the Webcam - he can probably walk you through it. Schedule your chat on a special occasion - perhaps on a birthday or holiday - and don't forget to plan your next one. You can even make it an annual event.

* Create a video file on your digital still camera. Forgot your mom's birthday or couldn't attend your child's school play? Send your loved ones a video clip so that they'll know how much you care.

Be creative, shake things up and share your ideas. It's never been so easy to "be there when you're not." - NU

Cisco CCNP / BCMSN Exam Tutorial: Configuring CGMP On Routers & Switches

If a Layer Two switch doesn't have the capabilities to run IGMP Snooping, it will be able to run CGMP - Cisco Group Membership Protocol. CGMP allows the multicast router to work with the Layer Two switch to eliminate unnecessary multicast forwarding.

CGMP will be enabled on both the multicast router and the switch, but the router's going to do all the work. The router will be sending Join and Leave messages to the switch as needed. PIM must be running on the router interface facing the switch before enabling CGMP, as you can see:

R1(config)#int e0

R1(config-if)#ip cgmp

WARNING: CGMP requires PIM enabled on interface

R1(config-if)#ip pim sparse

R1(config-if)#ip cgmp


When CGMP is first enabled on both the multicast router and switch, the router will send a CGMP Join message, informing the switch that a multicast router is now connected to it. This particular CGMP Join will contain a Group Destination Address (GDA) of 0000.0000.0000 and the MAC address of the sending interface. The GDA is used to identify the multicast group, so when this is set to all zeroes, the switch knows this is an introductory CGMP Join, letting the switch know that the multicast router is online.

The switch makes an entry in its MAC table that this router can be found off the port that the CGMP Join came in on. The router will send a CGMP Join to the switch every minute to serve as a keepalive.

A workstation connected to the switch on port 0/5 now wishes to join multicast group 225.1.1.1. The Join message is sent to the multicast router, but first it will pass through the switch. The switch will do what you'd expect it to do - read the source MAC address and make an entry for it in the MAC address table as being off port fast 0/5 if there's not an entry already there. (Don't forget that the MAC address table is also referred to as the CAM table or the bridging table.)




The router will then receive the Join request, and send a CGMP Join back to the switch. This CGMP Join will contain both the multicast group's MAC address and the requesting host's MAC address. Now the switch knows about the multicast group 225.1.1.1 and that a member of that group is found off port fast 0/5. In the future, when the switch receives frames destined for that multicast group, the switch will not flood the frame as it would an unknown multicast. Instead, the switch will forward a copy of the frame to each port that it knows leads to a member of the multicast group.


Two major benefits of CGMP are the explicit Join and Leave Group messages. In the next part of this BCMSN exam tutorial, we’ll take a look at the Leave Group messages.