The comparison and contrast between the 2 main reference models which uses the concept of protocol layering. Open System Interconnection Model (OSI) Transport Control Protocol /Internet Protocol (TCP/IP). Transmission Control Protocol (TCP) A connection-oriented transport protocol. Connection-oriented transport protocols provide reliable transport, in that if a segment is dropped, the sender can detect that drop and retransmit that dropped
segment. Specifically, a receiver acknowledges segments that it receives. Based on those acknowledgments, a sender can determine which segments were successfully
TCP operates at the transport layer of the OSI model.
TCP three-way ...view middle of the document...
In addition, FTP transmits data between sender and receiver in an unencrypted format.
Identify the purpose, features, and functions of the following network components:
• Network interface cards (NICs), ISDN adapters, and system area network cards
• Wireless access points (WAPs)
A wide range of devices are used in modern networking. As a Network+ certified technician, you will need to have a good understanding of commonly used devices.
Given an example, identify a Media Access Control (MAC) address.
MAC addresses are the means by which systems communicate at a base level. As a network administrator, you will need to understand the purpose, function, and expression of MAC addresses.
• Switching Methods
• Working with Hubs and Switches
• Hub and Switch Ports
• Cables Connecting Hubs and Switches
• Hub and Switch Indicator Lights
• Rack Mount, Stackable, and Freestanding Devices
• Managed Hubs and Switches
Typically, a local area network exists in a house or a university campus, while a wide area network exists over many office buildings separated by a vast distance. The office buildings in a WAN may be in different countries or even continents. For example, the headquarters may be in USA, the regional office may be in the UK, and the branch office may be in India. The workers in these three buildings use a Wide Area Network to collaborate with each other. The Internet can also be considered as a WAN, with the Ethernet being a classic example of WAN. Let us have a look at the two structures and their differences.
In a LAN setup, devices are connected to a switch or a hub. Shared devices are also connected to a switch that is centrally located. In case the devices need to be connected to the Internet, the switch is then connected to the ISP and thus, to the Internet. The data that is shared amongst these devices is stored in servers. If more devices need to be added, an extra hub or switch can be added.
Local Area Network (LAN) has higher bandwidth, thus is faster when compared to a WAN. The maximum speed of a LAN can be 1000 megabits per second. As LAN is faster, it is widely preferred for sharing computers in a network. The network is easy to set up, most computers and laptops manufactured today come with the RJ45 port built-in on the motherboard, which is used to connect to the network. In case of older machines that do not have this port, a separate NIC (Network Interface Card) will be required to be installed. This card fits in the PCI slot on desktops, and the PCMCIA slot on laptops.
The main advantage of using LAN is the ease of sharing. Computers, if connected to the same LAN, can even share a printer. The biggest hurdle that a firm faces while connecting computers in a LAN is the monitoring of traffic for the Internet. If there is too much load put on only one computer or on a...