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Chap 2-6 Networking
Chap 2-6 Networking Class Review Questions
| Question | Answer |
|---|---|
| What is an example of software that creates packes for moving data across networks? | Internet Protocal |
| What most often provides the physical connection between the PC and the network? | NIC |
| What enables a computer to send a packet that every other PC on the network will process? | The Broadcast address |
| What can you use to connect two very different networks? | A router |
| Every NIC has a hard-coded identifier called what? | MAC Address |
| What provides an excellent tool for conceptualizing how a network works? | OSI 7 layer model |
| On a sending machine, data gets broken up at what layer of the OSI 7 layer model? | Transport layer or layer 4 |
| NIC's encapsulate data into a _________ for sending that data over a network. | Frame |
| A ______ enables multiple machines to connect over a network. | Hub |
| The ________ provides the key interface between the physical and network layers. | Data link layer |
| Which layer of the osi 7 layer model converts the ones and zeroes to electrical signals and places these signals on the cable? | Physical layer |
| The term "unshielded twisted pair" is best decribed by what network component? | Cable |
| What best describes the contents of a typical network frame? | Recipient's MAC address, sender's MAC address, data, CRC |
| 23.4F.17.8A.4C.10 is most likely to be what type of address assigned to a NIC? | MAC Address |
| Which layer of the OSI model involves routing? | Network layer |
| How much data can a typical frame contain? | 1500 bytes |
| What best describes an IP address? | a dotted decimal notation assigned to a NIC by software |
| Which layer of the OSI model makes sure the data is in a readable format for the Application layer? | Presentation Layer |
| What enables you to connect a PC via modem to an IP network? | router |
| What handles the initial connection between two computers to verify that the receiving system can handle the network request of the sending system? | Session software |
| What is layer 3 of the osi 7 layer model? | Network Layer |
| What component of Layer 2 of the OSI 7 layer model is responsible for the ordered delivery of frames, including retransmission of missing or corrupt packets? | LLC sublayer |
| Which components work at layer 1 of the osi 7 layer model? | cables and hubs |
| If a sending system does not know the MAC address of the intended recipient system, it sends a broadcast frame with what MAC address? | FF-FF-FF-FF-FF-FF |
| What is a network topology that relies on a main line of network cabling, normally coaxial cable. | Bus |
| The _______________ of a cable will determine its speed. | category rating |
| A ____________ provides more fault tolerance than any other basic network topology. | Mesh |
| When your network has all computers connected to a centrally located wiring closet, you have a physical _____________ network. | Star |
| ___________ Networks use more than one type of basic network topology. | Hybrid |
| CAT 5e cable is a type of _____________ wiring. | UTP |
| Coaxial cable uses a braided metal shield to protect data from ________________. | EMI or Electro-magnetic interference |
| Network cabling can use either light or electricity to trasmit data. The faster of the types uses light along what kind of cable? | Fiber Optic |
| _________________-Grade UTP must be installed in ceilings, while ___________-Grade UTP is often used to connect one floor to another vertically in a building. | Plenom, PVC |
| The twisting of the cables in UTP an STP reduces ________________. | Crosstalk |
| What organization is responsible for establishing and promoting the networking standards? | IEEE or Institute of Electrical and electronics engineers. |
| What aspects of network cabling do the IEEE committees establish? | frame size, speed, and cable types |
| What are types of coax cabling that have been used in computer networking? | RG8, RG45, RG58 |
| What applications are best suited for fiber-optic cabling? | High EMI areas and long distances |
| What are the main components of fiber optic cabling? | cladding, insulating jacket, and fiber |
| What is the most popular size fiber optic cabling? | 62.5/125um |
| Most fiber-optic installations use LED's to send light signals and are known as what? | multimode |
| Why must the main cable in a bus topology be terminated at both ends? | to prevent the signal from bouncing back and forth |
| Where are you most likely to encounter a mesh network? | On wireless networks |
| Which committee is responsible for wireless networking standards? | IEEE 802.11 |
| The _________________ is unique to each individual NIC. | Mac Address |
| When extra "filler" data is needed in a packet, a _____________ is added. | Pad |
| Another name for a packet is a ___________. | frame |
| A NIC that is listening for all packets sent along the wire is said to be in _____________ mode. | promiscuous mode |
| The first item in a data packet is the ________. | Preamble |
| A hub acts as a _____________ in that it copies all incoming signals to every connected port. | repeater |
| Connecting switches incorrectly can create a __________________, which can make the whole network stop working. | bridge loop |
| Hubs can be daisy-chained through their ____________, or the use of a _________________. | uplink port, crossover cable |
| _________________ has a maximum distance between node and hub of 100 meters while _______________ has a maximum distance of 2000 meters. | 10BaseT, 10BaseFL |
| A ___________________ can be used to interconnect different Ethernet types. | media converter |
| What is another term commonly used for frame? | packet |
| How are the connectors wired on a crossover cable? | One end is TIA/EIA 568A; the other end is TIA/EIA 568B |
| What items make up the CSMA/CD system used in Ethernet networks? (3) | Carrier sense, Multiple access, and Collision detection |
| What happens when 2 computers transmit through a hub simultaneously? | A collision occurs |
| What is a group of nodes that hear each other's traffic? | Collision domain |
| Which committee is responsible for Ethernet standards? | IEEE 802.3 |
| What type of cabling do modern Ethernet networks use? | 10BaseT |
| What is the purpose of a preamble in an Ethernet frame? | It gives the receiving NIC time to realize a frame is coming and to know when the frame starts. |
| What is a valuable network took that can be used to examine all frames on the network, regardless of their intended recipient? | Sniffer |
| For what purpose is a crimping tool used? | To attach a RJ-45 connector to a UTP Cable |
| What are the limitations of a 10BaseT cable? | maximum speed of 10 mbps, maximum of 1024 nodes per hub, minimum CAT 3 or better UTP with RJ45 connectors |
| What feature of switches prevents the problem of bridge loops? | STP |
| When a network device can both send and receive data at the same time, it is said to be __________. | full duplex |
| ________________ has a maximum cable length of 2 km and uses multimode fiber with ST or SC connectors. | 100BaseFX |
| __________________ can use CAT 3 but ______________ must use CAT 5 or better. | 100 Base T4, 100 Base TX |
| 802.3z and 802.3ap are both __________________ standards. | Gigabit Ethernet |
| ___________________ supports the longest maximum distance for Gigabit Ethernet. | 1000BaseLX |
| The __________ and ___________ IEEE standards support the longest maximum distance for 10-Gigabit Ethernet. | 802.3ab, 802.3z |
| Many fiber experts consider the _____________ to be the predominent fiber connector. | local connector |
| What is the cheapest and most popular 10-GbE media type? | 10 GBLR |
| Routers with __________ can accept a variety of 10-GbE media types. | MSA |
| What is the physical limit for the number of ports on an Ethernet hub? | 1024 |
| When a network device can only send data or receive data, but not both at the same time, it is operation in what mode? | half duplex |
| What important backbone technology is also known as gigabit ethernet? | 1000BaseT |
| What are the 2 major UTP variations of fast ethernet? | 100BaseTX and 100BaseT4 |
| What are 3 limitations of fast ethernet over UTP? | Distance is restricted to 100 meters from node to hub, shielding may be inadequate for some installations, intrusion from outsiders may be possible without detection. |
| Which standard defines fast ethernet using fiber cabling? | 100 Base FX |
| Name 3 fiber connector types...... | LC, MT-RJ, AND ST |
| What do you need to connect varying 10-GbE cable types to the same router? | multisource agreements on the router |
| Which standard defines gagabit ethernet over UTP copper wire? | 802.3ab |
| You've lost the manual to your router. How can you tell the difference between a 1000BaseT port and a 100BaseT port on a router just by looking? | You cannot tell difference. They look exactly the same. |
| What will happen if you connect a 10BaseT NIC to an auto-sensing switch? | The 10BaseT NIC will operate at 10 megabits while connected 100-megabit devices will operate at their full speed of 100 megabits. |
| What benefit does full-duplex offer? | It allows all NIC's on a hub to send signals at the same time without collisions, and it doubles the bandwidth of the network. |
| What is the difference between the R and W designations in 10GBase standards? For example, 10GBaseLR and 10GBaseLW, or 10GBaseER and 10GBase3EW. | The R and W indicate differences in the circuitry, with the W versions used to conect to SONET equipment. |
| All the cabling from individual work areas runs via ______________ to a central location. | Horizonal cabling |
| The central location that all cabling runs to is called the ______________________. | Telecommunications room |
| A single piece of installed horizontal cabling is called a _____________. | Run |
| The set of standards established by the EIA/TIA regarding network cabling is called _____. | 606 |
| You use a ________________to connect a strand of UTP to a 110 blocki or 66 block. | punchdown tool |
| A short UTP cable that uses stranded, rather than solid, cable is called a ___________ and can tolerate much more handling near a patch panel. | patch cable |
| The type of network interface unit (NUI)that enables an ISP or telephone company to determine if a home DSL box or calbe router has been disconnected is called a __________. | smartjack |
| The spot there a cable comes out of the wall at the workstation is called a _______________. | cabledrop |
| THe height measurement known a U is used for devices that fit into a ____________________. | Equipment rack |
| The term _____________ describes the process of a signal weakening as it progressed down a piece of wire. | attentuation |
| What describes the length of cable installed within walls from a telecommunications room out to a jack? | Cable drop |
| What is the tem used to describe where the network hardware and patch panels are kept? | Telecommunications room |
| Aside from outright breakage, what's the primary worry with bending a fiber optic cable to much? | Light Leakage |
| when connecting a cable run onto a patch panel, which tool should be used? | 110 punchdown tool |
| What NIC type offers the most versatility? | 10/100/1000 |
| What is the structured cabling name for the end user's office space where network computers will be set up? | Work area |
| What type of twisted-pair cabling would work best within ceilings near lighting? | Solid core plenum |
| Why would network techs use stranded core cabling from a patch panel's ports to a switch? | flexibility |
| What is the first thing a professional cable installer should do when providing an estimate at a site? | Request a floor plan |
| What component would best allow more servers to be installed in the limited space of a telecommunications room? | equipment rack |
| How tall is a network router that is 8U? | 14 inches (1.75x8) |
| What is generated by every piece of UTP cable in existence? | crosstalk |
| The following statement is true about what type of cabling? "The term "demarc" refers to a physical location while the phrase "network interface unit" refers to a piece of equipment provided by an ISP. | structured cabling |
Created by:
skylerjennah
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