Girl Geekette

The diagram shown below demonstrates the fixed packet structure that is use by TCP/ This fixed packet structure is used to provide flow control, maintain the reliability of the communication and ensure that any data that is missing is resent buy sequencing and acknowledgement.

The Flag field is a 1 byte field. Common flags in this field include

To allow two hosts to communicate and exchange data reliably, TCP performs a three step handshake before any of the data is sent. This is when TCP guarantees that the data will arrive in tact by using a sequence and acknowledgement numbers. After all data is sent, TCP then performs a four step shutdown that concludes the session.

Three Step Startup

Four Step Shutdown

Be sure to check out the new section I have added with questions of the day! They can be found at Question of the Day under the Categories. Categories include A+ Hardware A+ Software CCNA Linux+ Security+ and Server+ . New categories to be added soon.

When you click on the link for the different categories, a new window will appear with a multiple answer question. Be sure to come back each day for a new question.

Things have been going at a rapid pace for me lately. July6th, I passed my CCNA exam. I am SO glad that is over! 3 weeks before that was my CWNA and 2 weeks before that was my Server+ exam. All the studying has made long hours of studying and only a little bit of play along with work.

Amongst other things, I have also decided to go back to school. I am now working on getting a Bachelors of Science and IT and after that I want to get a Masters in IT. I would love to get my masters from SANS.

With all that is going on, I still have a few certs left that I want to attain this year. My plans now are to be a Certified Ethical Hacker (From EC Council) and then I am going to finish my Microsoft Certs to be Microsoft + Security Certified. After those , I have one left I want to accomplish this year - retaking the Linux+ certification and passing. We shall see how it goes!