OSI Network-chp8
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151 terms
Terms | Definitions |
|---|---|
 How are networks formed? | system formed by links |
| What are websites that allow individuals to link to each other's pages called? | Social Network |
| What are connections with your friends called? | Person Network |
| What two things do computers share when linked by a network? | Data & resources |
| What is the smallest "network" you can create? | two computers |
| What is a collection of hosts connected by networking devices? | Host connected by Network Devices |
| What is any device that sends and receives information on the network called? | Host |
| What are devices that are connected to hosts called? | ~Network printer ~mobile handhelds ~computers ~VoIP |
| When a printer is connected directly to a switch, is it a host or peripheral? | Host &Peripherals (End & Intermediary devices) |
| Network devices link together using a variety of connections. What type of cabling uses electrical signals? | ~Copper ~Fiber-Optics ~Wireless |
| What type of cable uses light pulses to transmit? | Fiber-Optics |
| What type of connection uses laser technology? | Wireless Connection |
| What are two benefits of networking _ computers? | Lower=>COST Increased=>PRODUCTIVITY |
| When sharing a networked printer, where are the print jobs sent? | central server |
| What type of tool is email considered? | Services |
| What device manages network resources? | Servers |
| What is a group of interconnected devices that is under the same administrative control called? | LAN |
| Who controls the security and access control policies that are in force on the network? | Administrative |
| What are networks that connect LANs in geographically separated locations? | WAN |
| What is the most common example of a WAN? | Internet |
| Who interconnects LANS? | Telecommunication services Providers |
| What is used to transmit and receive data over wireless devices? | Copper Cabling |
| On a wireless network, what is connected to the network with copper cable? | Radio Waves |
| In a peer-to-peer network, how are devices connected to each other? | Devices connected to each other w/o any additional networking devices between them |
| What is the maximum number of computers that should be in a peer-to-peer network? | 10 or less |
| Is there a centralized security? | NO |
| What device answers a clients request for information in a client/server network? | Server |
| Where is all network data stored? | Centralized Server |
| What two things must each user provide to gain access to network resources? | Authorized UserName & Password |
| What is the amount of data that can be transmitted within a fixed time period? | Bandwidth |
| What are the small chunks of data called that are sent over a network? | Packets |
| How is bandwidth measured? | bits per second |
| How do you write megabits per second? | Mbps |
| How many bits are in one byte? | 8 bits |
| What is unidirectional or one-way communication called? | Simplex ((unidirectional)) EX: TV station to TV @ home |
| When data flows in one direction at a time, what is it called? | Half-Duplex((two-way radio)) EX:Police, CB radio, Emergency communication |
| What is data flowing in both directions at the same time? | Full-Duplex ((100 Mbps)) EX: Telephone conversation |
| Although the data flows in both directions, how is the bandwidth measured? | one direction ((100 Mbps-network cable)) |
| What type of communication is a telephone conversation? | Full-Duplex |
| What type of communication does a police two-way radio use? | Half-Duplex |
| What type of communications is DSL? | Full-Duplex ((Bandwidth)) |
| What is the number that is used to identify a device on the network called? | IP address |
| Must each device on a network have a unique IP address to communicate with other network devices? | YES |
| Each device on a LAN has to have an IP address. In order to communicate, these IP addresses must be in the same _____________? | Network |
| What on the host is assigned a physical MAC (Media Access Control) address? | NIC ((Network Interface Card)) |
| How often does the physical address of a host change? | the same as long as on the same Network |
| What is another name for a "logical address"? | IP address |
| How many bits are in an IP address? | 32 binary bits |
| What does the first part of an IP address identify? | Network |
| What does the second part of an IP address identify | Host on that Network |
| What is the only part of the IP address do routers need to know? | How to reach each Network |
| What class of IP address is used by universities? | B |
| What class is used for experimental testing? | E |
| What class of IP is given to customers by their ISP? | C |
| What portion of the IP address does the subnet mask identify? | Network portion of IP address |
| The Class A subnet mask is 255.0.0.0. What does the 255 indicate? | First octet of IP adress |
| What is the default subnet mask of a Class C address? | First 3rd octet of IP address |
| What settings in Windows, will you find TCP/IP settings? | Properties |
| What device enables a computer to connect to the network? | NIC |
| What does it mean that a MAC address is "burned in"? | MAC is permanently programed into NIC |
| What is used by the MAC to deliver data on the LAN? | ... |
| What software utility dynamically assigns IP addresses to NW devices? | (DHCP) Dynamic Host Configuration Protocol |
| What are the four types of information that a DHCP server can assign to hosts? | ~IP Address ~Subnet Mask ~Default Gateway ~Optional Values (DNS) Domain Name System |
| If a DHCP server offers an IP address and the host accepts, what is it called when the server assigns an IP address for a specific period of time? | Lease |
| How can a computer be configured to accept an IP address from a DHCP server? | Obtain an IP Address Automatically |
| Your computer has been assigned an address of 169.254.2.1. Which service dynamically assigned this address to the computer? | (APIPA) Automatic Private IP Addressing |
| What is a protocol? | Set of Rules |
| What are the five main functions of protocols? | Identifying __ERRORS___ Compressing the data Deciding how data is to be _SENT___ Addressing data Deciding how to_ANNOUNCE__ sent and received data |
| What protocol is small, nonroutable, and designed for a work group network that requires no connection to the Internet | (NetBEUI) NetBIOS Extended User Interface |
| What protocol used to download email messages from an email server? | SMTP Simple Mail Transfer Protocol |
| What protocol announces errors and congestion on a network? | (ICMP) Internet Control Message Protocol |
| What CLI (command line utility) utility tests connection between computers? | Ping =>sends a ICMP echo |
| How many pings are sent to a destination when testing connectivity? | 4 |
| If you ping www.cisco,com, what will the server display in the answer? | 198.133.219.25 |
| What does a router do with a packet if it doesn't know where to send it? | Delete it |
| What devices extend the range of a network by receiving data on one port, and then regenerating the data and sending it out to all other ports? | Hub aka.=> Concentrators |
| What are sections of a network called? | Segments |
| What device maintains a table of MAC addresses for computers attached to each port? | Switch |
| What device connects entire networks to each other? | Router |
| What address do routers read? | IP |
| What does a Wireless AP use to communicate? | Radio Waves |
| What type of cable uses Glass/Plastic to transmit data? | Fiber Optics |
| What is noise generated by adjacent pairs of wires called? | Twisted Pair |
| What is needed so that your network communication isn't slow due to interference caused by the magnetic field? | Cancellation effect |
| What is the most commonly used cabling in networks? | UTP Unsheilding Twisted Pair |
| What is the range of Unshielded Twister Pair cable? | 328feet (100m) |
| What in the cable limits signal degradation? | EMI Electromagnetic interface |
| What category has four pairs of wires and a transmission rate of 100 Mbps? | STP Shielded twisted pair |
| What cable is used in most network installations? | Coaxial |
| What type of coax cable is used for tv installations in the US? | RG-59 |
| Why can fiber-optic cable deliver signals that are clearer, can go farther, and have greater bandwidth than cable made of copper or other metals? | Not effected by EMI and RFI |
| What defines the way in which computers, printers, and other devices are connected to a network? | Lan Topologies |
| What determines how the hosts communicate across a medium, such as a cable or the airwaves? | Logical Topologies |
| What topology is a star network with an additional networking device connected to the main networking device? | Extended Star topology |
| What topology connects all devices to each other and is used in WANs that interconnect LANS? | Mesh Topology |
| What topology is is first come, first served for transmitting data on the network? | LAN Artchitecture |
| What is the Ethernet IEEE standard? | Institute of Electrical and Electronic Engineers |
| What access control method must be used on this network? | IEEE802.3 |
| How do hosts access the network using the IEEE802.3 standard? | First come, first served broadcast topology |
| As networks get bigger, what physical topology does an Ethernet network use? | Logical Bus/Broadcast |
| What is the speed of Gigabit Ethernet? | 1Gbps |
| What is often used to connect several buildings in an office complex or on a university campus? | FDDI Fiber Distributed Data Interface |
| Which standards organization has more than 860 active standards? HINT: Best Known For Developing Standards | IEEE |
| What is the Ethernet standard? | IEEE 802.3 |
| What network access control method must Ethernet networks implement? | CSMA/CD Carrier Sense Multiple Access w/Collision Detection |
| What must a host do before it sends data? | Listen to Network for clearance |
| How do hosts waiting to transmit data react to a collision on a CSMA/CD network? | sends out a jam signal that tells all stations to stop transmitting & to run a back-off algorithm |
| Who has permission to transmit first, after a collision? | First station that detects the collision, or the Doubling of voltage |
| Ethernet collisions can reduce transmissions by what percentage? | 40% |
| What technology uses a star topology? | 10 BASE-T |
| What is another name for 100BASE-TX? | Ethernet technology |
| What is the maximum range a data signal can travel through a 1000BASE-T network segment? | 328feet (100m) |
| What type of Ethernet implementation should you use for live video? | 100 BASE-TX |
| What is the IEEE standard that specifies connectivity for wireless networks? | IEEE 802.11 |
| Which wireless IEEE standard operates in a radio frequency of 2.4 GHz and supports a maximum bandwidth of 54 Mbps? | IEEE 802.11a |
| Which model was created by the DoD? | TCP/IP |
| What protocol is the standard for transporting data across networks? | TCP/IP |
| What model standardized the way devices communicate on a network? | OSI |
| What layer provides web browser services? | Application |
| What layer describes how hosts access the physical media? | Internet |
| What layers of the OSI model are implemented in hardware? | Protocol Stacks |
| Which layer of the OSI model is primarily concerned with accessing the physical media and physical addressing? | Data Link |
| Which term describes the process of adding headers to data as it moves through the layers of the OSI model? | Virtually travel |
| What is the term to describe data as it is broken down and sent down the layers of the OSI model? | Encapsulation |
| What does a segment become at Layer 3? (Network) | Packet |
| What device is required to connect to the internet? | NIC |
| What should you disable when installing a new driver? | Virus Protection |
| What is a best practice to follow when installing a driver? | Close all application when installing |
| Why should you reboot after installing a driver? | Ensures Installation |
| What will indicate a network connection after you plug in the cable? | LED / Link Light |
| What must all NICs be configured with in order to participate on the network? (3) | ~Protocol ~IP address ~MAC address |
| What is an electronic device that transfers data between one computer and another using analog signals over a telephone line? | Dialup Network (DUN) |
| What's the acronym for the "plain old telephone system"? | POTS |
| What is the maximum bandwidth when using an analog telephone connection? | 56Kbps |
| When using ISDN, what technology carries the data? | Digital Technology |
| What technology shares the telephone wires with analog signals? | DSL |
| Which technology is not good for hosting a web server? 8.10.2 Define power line | ADSL (Asymmetric Digital Subscriber Line) |
| Which has faster bandwidth - analog modems or PLC? | PLC Power Line Communitcation |
| What type of signals can PLC carry? | Voice & Data Signals |
| What makes PLC easy for home network installers? | Plug to outlet |
| Which WAN technology uses a wide range of frequencies or channels through which to transmit data? | Broadband |
| What four technologies are considered broadband? | ~Satelite ~Fiber ~Cellular |
| What are the satellite download speeds? | 500Kbps |
| What is a disadvantage of using VoIP? | Counting on Internet |
| What is the biggest problem with network devices, especially in the server room? | Heat |
| What should you do to your cable to save you time later? | Label |
| After gathering information from the customer, what should a technician do? | Establish Theory |
| What are the three areas where network problems are likely to occur? | ~Network cable unplugged ~Firewall blocking port 23 ~Remote device not configed |
| What does NIC do? | Reads MAC(media access control) address |
| NAT (network address translation) | Process used to convert private IP address to public IP address |
| DSL | Digital Subscriber Line |
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