April+11th+-+April+15+2011+-Journal

__** Wiki Spaces [Rubric] Mr.-Brooks **__ **__ Material Covered __** **__ Daily Journal:- __****__ Monday- Tuesday- __** **__ Wednesday- Thursday-Friday __** **__ Communication Level: Detailed notes on progress. Insert Print Screen images. __**

Good WORK on your wiki Congrats on your unit 5 score
 * NE || LV 1 || LV 2 || LV3 || *LV4 ||
 * No Evidence || Some evidence || Below expectations || meets expectations || exceeds expectations ||


 * __Monday April 11th 2011:__**





I started to read chapter 4 and I got up to the following page: 4.5.4 Today I was sick and could not come to school therefore I did not go to my third period computer engineering class.
 * __Tuesday April 12th 2011:__**

But at home, I finished reading chapter 4 and will probably do the test the next day I come back. - What the internet is a network of networks that connects users in every country in the world. There are currently over one billion Internet users worldwide. - IP is the internet protocol and it uses packets to carry data whatever someone is doing, either playing a video game or sending an email to a friend to name a few. Each IP packet must contain a valid source and destination IP address. Without valid address information, packets sent will not reach the destination host. Return packets will not make it back to the original source. - ISP's handle packets by first identifying the source and destination IP address of that individual packet. When a packet is sent across the Internet, the ISP determines whether the packet is destined for a local service located on the ISP network, or a remote service located on a different network. -NOC - Network operating center - Controls traffic flow and houses services such as email and web hosting and every ISP must have an NOC. - Ping - It measures the time that it takes test packets to make a round trip from the source to the destination and whether the transmission is successful. - Traceroute- Traces packets from their source to their destination. Traceroute displays each hop along the way and the time it takes for each one. If a problem occurs, the display of the time and the route that the packet traveled can help to determine where the packet was lost or delayed. The traceroute utility is called tracert in the Windows environment. - Internet Cloud- Diagram used to represent the Internet or any other complex network. When packets travel across the Internet, they pass through many network devices. The Internet can be thought of as a network of routers, interconnected with one another. Very often, there are alternate routes between routers, and packets may take different paths between source and destination. - Devices in the internet cloud- The ISP and the end user must have the same technology for example; if the end-user is using DSL technology to connect, the ISP must have a DSL Access Multiplexer (DSLAM) to accept these connections. For cable modems to connect, the ISP must have a Cable Modem Termination System (CMTS). - UPS - Uninterrupted power supply for both the enterprise level and the home and small business level. - Physical and environmental requirements - Environmental factors, such as heat and humidity, must also be considered when planning a network installation. However, because of the volume of equipment and the amount of power consumed in an ISP, high-end air conditioning units are necessary to maintain controlled temperatures. For the home/small business, ordinary air conditioning, heating, and humidity controls are usually sufficient. - There are three types of network cables - TP (Twisted Pair), Coaxial Cable, and Fiber Optic - TP cables consist of one or more pairs of insulated copper wires that are twisted together and housed in a protective jacket. Like all copper cables, twisted pair uses pulses of electricity to transmit data. - EMI - Electromagnetic interference, a type of noise that interupts the rate of low of data through TP and Coaxial cables but the Fiber optic cables are imune to it because it uses light as teh data. -Coaxial cables also use electrical signals for data transfer.It provides improved shielding compared to UTP, so has a lower signal-to-noise ratio and can therefore carry more data. It is often used to connect a TV set to the signal source, be it a cable TV outlet, satellite TV, or conventional antenna. It is also used at NOCs to connect to the cable modem termination system (CMTS) and to connect to some high-speed interfaces. - Fiber optic cables use rays of light to transmit data and In addition to its resistance to EMI, fiber optic cables support a large amount of bandwidth making them ideally suited for high-speed data backbones. Fiber optic backbones are found in many corporations and are also used to connect ISPs on the Internet. - Two types of fiber optic cables - Single mode and multimode - UTP (unshielded twisted pair) cables - the TIA/EIA organization defines two different patterns, or wiring schemes, called T568A and T568B. Each wiring scheme defines the pinout, or order of wire connections, on the end of the cable. - Two types of UTP cables; Straight-through (T568A is on one end of the cable, T568A is also on the other) and crossover (T568A on one end of the cable and T568B on the other end of the same cable).
 * The following is the relevant information that I read:**

Today I reviewed chapter 4 by reading some of the relevant information and then doing the chapter 4 quiz. I am ok with my mark but I will get better on future tests and will do the chapter 3 retest because I got a bad mark on that test and therefore I will take the retest on friday.
 * __Wednesday April 12th 2011:__**


 * __Thursday April 13th 2011:__**


 * The relevant information that I read today:**
 * -Purpose of the IP address**
 * - Address structure**
 * - Parts of IP address**
 * - The interaction between IP addresses and Subnet masks**
 * - Private and public IP address**
 * - Unicast, Multicast, Broadcast**
 * - Static and dynamic addresses and the assignment**
 * - DHCP's**
 * - Address assignment**
 * - Network address Translation**

Today I completed my chapter 5 test and I got a fairly good mark which is shown by the screen dump below:
 * __Friday April 14th 2011:__**