IT Essentials Chapter 8 Review
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Created by:
amandaiallen on May 16, 2012
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Terms | Definitions |
|---|---|
 Define "converged" network: | include general purpose computers(PCs and servers) as well as devices with more specific functions (printers, phones, tvs, game consoles) |
| What are three types of data that might travel on the same network? | - voice - video - data |
| Name three types of physical network connections w/their corresponding signal type: | - wired cables : electrical - fiber optic : light - wireless : radio |
| Name two advantages to networking devices together: | - access info stored on other computers - print documents using shared printers |
| Define LAN: | a group of interconnected devices that is under the same administrative control |
| Define WAN: | A network that connects LANs in grographically separated locations |
| Define WWAN: | Wireless devices are used to transmit and recieve data using radio waves |
| How is an access point typically connected in a WWAN? | Copper cabling |
| peer-to-peer network | theres no dedicated servers of hierarchy; each device has equal capabilities and responsibilities |
| client- server network | client requests info from the server; the server provides the info to the client |
| What are two disadvantages of a peer-to-peer network? | - no centralized network administration; difficult to determine who controls resources on the network - no centralized security; each computer must use separate security measures for data protection |
| When might you recommend a peer-to-peer style network over a client-server model? | in your home when you have more than one computer you can share files with other computers, send messages and print documents to a shared printer |
| What are two disadvantages of a client-server model network? | - server can get overladed - more expensive and difficult to set up initially |
| What does bps stand for and what does it measure? | bits per second (how bandwidth is measured) |
| Through three drawings (with arrows) display the difference(s) between simples, half duplex, and full duplex: | simplex - single lane, one way half duplex - alternating transmission in 2 directions but not in both directions simultaneously - both directions, same time and both directions |
| All hosts that talk on a network need a(n) _______ address. | IP |
| IP addresses contain _____ bits which are divided into 8-bit ___________ so it's easier for humans to read in decimal format. | 32 bits are divided into 8 bit bytes |
| IP addresses are hierarchical and are composed of _____ portions. | 2 |
| The two portions are the __________ portion and the ___________ portion. | network and host |
| There are five classes of IP addresses. They are (list them): | Class A - large networks (large companies and countries) Class B - medium networks (universities) Class C - small networks ( ISPs for customs subscriptions Class D - multicasting Class E - experimental testing |
| Subnet mask | used to distinguish the network portion from the host portion of an IP address |
| Use the included subnet mask to say what the NETWORK portion is: 192.154.16.2 / 255.255.0.0 | 192.154 |
| use their included subnet mask to say what the NETWORK portion is: 145.16.13.2 / 255.255.0.0 | 145.16 |
| use their included subnet mask to say what the NETWORK portion is: 10.0.0.9 / 255.0.0.0 | 10 |
| use their included subnet mask to say what the NETWORK portion is: 199.151.51.41 / 255.255.255.0 | 199.151.51 |
| use their included subnet mask to say what the NETWORK portion is: 54.16.98.2 / 255.255.0.0 | 54.16 |
| Use the subnet mask to identify the HOST portion of these IP addresses: 192.154.16.2 / 255.255.0.0 | 16.2 |
| Use the subnet mask to identify the HOST portion of these IP addresses: 145.16.13.2 / 255.0.0.0 | 16.13.2 |
| Use the subnet mask to identify the HOST portion of these IP addresses: 10.0.0.9 / 255.0.0.0 | 0.0.9 |
| Use the subnet mask to identify the HOST portion of these IP addresses: 199.151.51.41 / 255.255.255.0 | 41 |
| Use the subnet mask to identify the HOST portion of these IP addresses: 54.16.13.2 / 255.255.0.0 | 13.2 |
| What is the subnet mask typically associated with Class B? | 255.255.0.0 |
| IP addresses can be entered manually into a Windows workstation through network properties / TCPIP. If I had a server distribute addresses instead, what is that service called? | DHCP |
| If I typed IPCONFIG at the command prompt and saw this IP configuration... IP address: 10.0.216.5, Subnet Mask: 255.255.0.0, Defaut Gateway: 10.0.0.1 and my machine wanted to visit the IP address 72.16.15.43, which through my subnet mask is determined to NOT be on my local network, what would happen next? | the machine will then send its requests to the gateway |
| Uhoh. I started my computer, I can't get on the web, and IPCONFIG says I have an IP address that looks like this: 169.254.14.234. What happened? | the network cable is unplugged, the router is powered off, the connections is bad, or the NIC is bad |
| A router implementing NAT translates ______________ addresses which can't travel on the Internet to ______________ addresses that can. | private and public IP |
| What is the protocol used by Novell Netware? | IPXISPX |
| What are three protocols that work with email? | - POP3 - IMAP - SMTP |
| In your own words, describe what a protocol is. | a set of rules |
| The ping utility uses the _________ protocol. | ICMP |
| Hubs are also called _______________________. | concentrators |
| (No answer) Hubs are stupid and just broadcast (repeat) everything that comes into any of its ports. They operate at Layer 1 on the OSI model (physical layer). | ... |
| Switches use a _______ _____________ table to direct traffic out the appropriate port. | mac addresses |
| Switches use the MAC address to direct traffic, but a router uses a _________ address to route traffic. | IP |
| What is the length limit on UTP (such as CAT5) cabling? | 100m = 328 feet |
| What determines the differences between category ratings in UTP? | - number of wires in the cable - number of twists in the wires |
| What type of connector would be found at the ends of a CAT5 cable? | RJ-45 |
| How fast is CAT3? _________ How fast is CAT5e? __________ | CAT3 - 10 mbps CAT5e - 1000 mbps |
| What type of cabling is copper-cored, with heavy woven metal shielding? | coaxial cable |
| What's another name for 10Base2? | thinnet |
| What is on the inside of a fiber cable? | optical fibers |
| What type of light signal travels through multi-mode fiber? | LEDS |
| What can go farther distances - multi-mode or single-mode fiber? | single-mode |
| Describe in your own words what a topology is: | study of building, geometric shapes, sizes |
| What might you find on a logical topology that wouldn't necessarily be on a physical topology? | IP addresses |
| Draw a star topology: | ... |
| Draw a mesh topology: | ... |
| What type of network has a bus logical topology but a star physical topology? | ethernet |
| What type of network has a ring logical topology but a star physical topology? | token ring |
| How fast (in bps) is gigabit ethernet? | 1000 mbps = 1 gbps |
| What is the central hub device called in token ring? | MSAU (multistation access unit) |
| How many computers can an FDDI dual ring support and what is the distance limit on the cable? | 500 computers for 100 k/m = 62 mi |
| Token ring networks have pretty much disappeared. Most are being replaced with __________ networks. | ethernet |
| Name three standards organizations commonly contributing to information technology: | - CCITT - IEEE - ISO |
| What is the IEEE standard for ethernet? | 802.3 |
| What is the IEEE standard for wireless? | 802.11 |
| What is the ISO standard for RJ-45 connectors? | 8877 |
| Can CAT3 be considered 10BaseT? | yes |
| How fast is 1000Base-T? | 1 gbps |
| What 802.11 standard gives me the widest range? | IEEE 802.11a |
| What 802.11 standard is 54Mpbs and is backwards compatible? | 802.11g |
| What two OSI layers are included in the Physical layer of the TCPIP model? | physical and data link |
| What layer corresponds to MAC addressing (ethernet)? | network access |
| What layer corresponds to HTTP (web browser)? | application |
| What layer corresponds to IP addressing (routing)? | internet |
| What layer corresponds to broken cable? | physical |
| What layer corresponds to TCP? | internet |
| Which type of network devices use the RIP protocol? | router device |
| Which is considered a logical address: IP or MAC? | IP |
| Which layer has built-in flow control? | transport |
| (No answer) The process of a packet going through layers and getting addresses/headers applied is called encapsulation. | ... |
| What is a NIC? | network interface card - lets computers connect to a network |
| Every NIC needs what three things configured: | - gateway - IP address - subnet mask |
| What do the link lights on a NIC tell us? | see if there is any activity |
| Describe one situation when the PING utility would help me. | PING your own IP address to make sure that NIC is working properly |
| What is the device I would use to connect to the internet over a phone line? | modem |
| What types of commands do you use on your modem? | Hayes command set (AT commands) |
| How fast is basic rate ISDN (BRI)? | 128 kbps / 64 kbps B channels and 16 kbps D channels |
| How fast is typical downstream DSL? | 384 kbps - 6 mbps |
| What does the "A" mean in ADSL? | asymmetric |
| What do dial-up, ISDN and DSL all have in common? (Think physical layer) | telephone lines |
| What is the advantage to PLN? | inexpensive / easy to install |
| Is a dial-up connection considered broadband? Is ISDN? Is Bluetooth? | broadband - no ISDN - yes bluetooth - no |
| What benefits did mobile phone network 3G give over 2G? | data speeds between 384 kbps and 14.4 mbps, full-motion video, streaming music, 3d gaming, faster web browsing |
| What protocol does 3G use? | EV-DO |
| VoIP (voice over IP) "joins" what two networks? | data networks and internet |
| Why would a company want to establish a VPN connection with its employees? | a VPN uses dedicated secure connections routed through the internet from the company private network to the remote user. when connected to the company private network, users become part of the network and have all access to all services and resources |
| Name three best practices (maintenance procedures) for communications closets: | - keep rooms clean - change air filters often - check cables often for exposed wires, twists or bent wires |
| List two reasons a remote device might not respond to a ping request: | - windows firewire disables PING by default - the remote device is configures to not respond to PING requests |
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