FIT 3.01 - Questions
Type of servers
a) File servers b) DHCP c) DNS d) Database e) Web f) Print g) Gaming h) Email i) Music
Ethernet Standards II
a. 10Base2 - Thin coaxial cable b. 10Base5 - Thick coaxial cable c. 10BaseT - Original twisted pair standard d. 100BaseT - Fast Ethernet e. 1000BaseT - Gigabit Ethernet f. 10GBaseT - 10GB Ethernet
Fiber Optic Cable Features
- Cable Length (Longest transmission, use of light) - Cost (Fiber Optic is most expensive) - Ease of Installation (Difficult to install) - Less susceptible to interference - Data can be sent at the speed of light. - A LASER transmitter encodes frequency signals into pulses of light: ones and zeros are sent through the cable. - The receiving end of the transmission translates the light signals back into data which can be read by a computer.
Electronic devices enable users to connect to the Internet. To access the Internet and the World Wide Web, the following are necessary:
- ISP (Internet Service Provider) - Internet Protocol (IP Address) - Mac Address - Network Interface Card
Advantages of Wireless Access Points
- Mobility - Network flexibility
Wireless Network Features
- Range (Depends on factors such as wireless card, access point, and obstacles in between) - Cost (Wireless price is dependent upon the complexity of the setup.) - Ease of Installation (Easy) - 802.11 (a,b,g,n) - Wireless standard - Interference can be caused by cordless telephones and microwaves - Wireless security includes: WEP, WPA, and WPA2
Disadvantages of Router
- Requires configuration - Required for SOHO configurations
Types of Transmission Media
-Coaxial cable -Ethernet cable -Fiber optic cable -Wireless transmission
Wireless Routers Facts
1. Wireless routers can broadcast a WiFi (Wireless Fidelity) network that computers with a WiFi antenna can use. 2. Password protection is important to protect a WiFi network from unauthorized access.
Internet Protocol Address (IP Address)
An IP Address provides a unique identification for a specific computer or network.
Ethernet cable features
Cable Length (Up to 100 meters) Cost (Twisted pair is the cheapest) Ease of Installation (Easy to install) Susceptible to EMI and RFI interference Twisted pair wiring reduces interference
Advantages pf VOIP Phones
Cheaper than the land lines
Type of cable specifically designed for carrying an electronic signal. It consists of four layers of material intended to reduce the amount of electromagnetic interference through the cable.
Coaxial Cable
Examples of End Devices
Computer, Printer, Server, VOIP phones, cameras and alarms
How is the cost of a Coaxial Cable compared to Fiber Optic and Twisted Pair
Cost (Twisted Pair < Coaxial < Fiber Optic)
allows a modem to send information formatted to be read by network computers.
Demodulator
Disadvantages of Switches
Does not create IP addresses No intelligent software
A device that is either the source or the destination of a message on a network.
End Device. Every device must have an IP address, MAC address and Network Interface Card (NIC). It is unique for every device.
Melinda has several devices in her home that she wants to connect to her home network. She has a laptop, tablet, printer and xBox. Which term identifies these types of devices?
End Devices.
Melinda connects her home computer to the router using a transmission media that is hardwired rather than wireless.
Ethernet Cable
Is a type of cable commonly used in high-speed wired computer networks. Ethernet connections must be connected to an Ethernet card in a computer.
Ethernet Cable -
A type of cable made of super-thin filaments of glass or other transparent materials that can carry beams of light. Data can be sent at the speed of light. A laser transmitter encodes frequency signals into pulses of light: ones and zeros are sent through the cable. The receiving end of the transmission translates the light signals back into data which can be read by a computer. The beams of light are less susceptible to noise and interference than other cables.
Fiber Optic
Unshielded twisted pair (UTP) Features
Found in Ethernet and phone systems Most common type of cable used for computer networks. Used for short to medium distances (up to 100 meters) Not shielded against EMI or other interference
Shielded twisted pair (STP) Features
Found in Ethernet and phone systems Shielded to protect against EMI More costly than UTP Used for short to medium distances (up to 100M)
Is a computer that manages tasks, communicates instructions, or delivers specific services to other computers, or clients, on a network.
Host. Also Know as Conputer, Terminal, Node. Hosts include computers, mobile phone, scanners, and printers. Expanded
What the router use to determine the pathway?
IP Address
A company that has a permanent connection to the Internet and can provide temporary access to its customers, individuals, and others.
ISP - A computer requires an ISP in order for communication software to work.
Advantages of Routers
Intelligent software that enables it to pass data quickly across the network
Network that consists of high speed network infrastructure at a single location used to deliver network applications and services. It devices over a short distance. often is used in an office building, a school or home, but can spread to several buildings.
Local area network (LAN) or Wireless local area network (WLAN)
Media Access Control
MAC - The MAC address is the hardware address of the NIC (Network Interface Card) on the end device.
Coaxial cable features
Max Cable Length is 200 meters (ThinNet) or 500 meters (ThickNet) Cost (Twisted Pair < Coaxial < Fiber Optic) Ease of Installation (Moderately difficult to install) Susceptible to EMI and RFI interference
Walker has connected a device to his computer that converts a computer's digital signal into frequencies that travel over telephone or television lines via coaxial cables. When the signal is received, the device converts the frequencies back into digital data that can be read by his computer.
Modem
Device that modulates signals to encode digital information and demodulates signals to decode the transmitted information
Modem. It comes from Modulator-Demodulator. A common type of modem is one that turns the digital data of a computer into modulated electrical signal for transmission over telephone lines and demodulated by another modem at the receiver side to recover the digital data.
Enables computers to interpret data received from a network.
Modulator
Disadvantages pf VOIP Phones
Must have electrical current, and connected to the Internet
A component used to connect computers or other electronic devices together so they can share files or resources.
Network Device
Used to connect electronic devices to each other within a working environment. They give users the ability to create and share information quickly and securely.
Network Systems
Sometimes used to refer to a communication endpoint. It can be a computer or some other device, such as a printer. Every node has a unique network address, sometimes called a Data Link Control (DLC) address or Media Access Control (MAC) address.
Node.
Types of Network Systems
PAN, LAN, WAN
A personal area network is a network created around an individual's personal workspace. It typically involves a mobile computer and a cell phone. Use Bluetooth or Infrared signals to be connected.
Personal Area Network (PAN)
Hardware device or software program that manages the paths along which information travels within a network.
Router
Rosa works for a lawyer. The lawyer is setting up another office on the other side of town. Rosa needs to purchase a network device that will allow the lawyer to access their clients' files from their new office.
Router
Which network device manages the path along which data travels in a network?
Router
Types of network devices
Router, Switch, Wireless Access Point, Modem
Small Office Home Office
SOHO
Disadvantages of Wireless Access Points
Security vulnerability Signal interference and limited number of frequencies Placement
Software and hardware that provides services to other computer programs and their users.
Server.
Types of Twisted Pair Cable
Straight-through Crossover Rollover (console cable)
A device that manages the sharing of multiple computers or networks on the same data connection.
Switch
The network administrator at ABC High School installed a network printer. He hardwired the printer to a device that allows users to print to the network printer.
Switch
Which network device lowers the probability of data collision?
Switch
Fact about Switches
Switches use the MAC address to determine pathway. Switches (are more intelligent devices than hubs
Ethernet Standards I
The Institute of Electrical and Electronics Engineers (IEEE) defines wired transmission in the 802.3 standard. The Ethernet standards comprise several wiring and signaling variants of the OSI physical layer in use with Ethernet. c. Typically written as XBaseT (X = transmission speed) T = Twisted pair cable.
WI-FI Standard (Wireless Fidelity)
The original standards for wireless networks were put out by IEEE in 1990. These standards are also called Wi-Fi, or Wireless Fidelity.
What is SSID?
The service set identifier, or SSID, is a name that identifies a particular Wi-Fi network to a wireless device. The SSID is required, can be up to 32 characters long and is case-sensitive.
Provides a path for information to be sent from one computer to another through a network.
Transmission Media
How the amount of electromagnetic interference through the cable is reduced in Ethernet cables
Using Twisted Pair wiring. Twisted pair wiring makes up Ethernet cable to reduce the amount of electromagnetic interference through the cable.
The method of delivering video and voice communications over a computer network
VOIP Phones
Each school building in a school district is networked. Additionally, each of the schools across a large area is connected into a network. Which term refers to the district-wide network?
WAN
A collection of LANs that is dispersed over a large geographical area. Several school LANs could be connected into a school district Network. The Internet is currently the largest area network.
Wide Area Network (WAN)
Melinda has a device in her home that helps connect her laptops, tablets, and her xBox360 to the Internet without a need for wires.
Wireless Access Point
Wi-Fi is a technology that allows electronic devices to exchange data wirelessly (using radio waves) over a network.
Wireless Transmission
Wireless Access Points functions
Wireless access point joins wireless clients to a wired Ethernet network
Advantages of using switches
a. Switches improve the throughput of Ethernet networks. b. Switches reduce the data collisions on a LAN network. c. Faster transfer rate than hub