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Networking
Q:
Reviewing log files is a time-consuming task and therefore should only be done when an attack on the network has occurred.
Q:
Physical security protects a system from theft, fire, or environmental disaster.
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A worm creates files that copy themselves repeatedly and consume disk space.
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A packet monkey is an unskilled programmer who spreads viruses and other malicious scripts to exploit computer weaknesses.
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You have been hired to design a small office network that will have 10 workstations and two servers. You want to use a network topology that is flexible for future growth and performance enhancements. Which topology should you choose?a. ring b. star c. busd. mesh
Q:
Which of the following accurately describes a function of a LAN?a. offers networking services over a long distance b. connects office networks in two different cities c. uses a modem to connect to an ISPd. uses switches to connect computers
Q:
Which of the following is NOT a typical function of a client operating system?a. enables a workstation to run applications b. processes information locally c. authenticates clients to access the networkd. communicates with other computers over the network
Q:
TCP establishes communication sessions among applications on two communicating computers.
Q:
The transmission control method used by Ethernet is called collision sense multiple access with carrier detection (CSMA/CD)..
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A large file is broken into hundreds of small data units called packets and each data unit is transmitted across the network.
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LANs often connect WANs over a long distance such as between cities, states, or countries.
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A client OS coordinates network activities, authenticates users to access the network and enables workstations to access shared network resources.
Q:
What is the difference between ADSL and SDSL?
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Name two enhancements of DOCSIS 3.0 over non-DOCSIS compliant cable modems?
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What are the two interfaces supported in ISDN and what are their respective data rates?
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What command would you send a Hayes compatible modem if you wanted the modem to ignore incoming calls?
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What is a winmodem and what is a disadvantage of using one?
Q:
What type of signal is embedded in the data of synchronous communication lines?
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Briefly describe the role of the UART in a modem.
Q:
What task does the controller component in a modem perform?
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Briefly describe what a modem does.
Q:
a. flow control f. protocolb. cable modem g. ADSLc. synchronous communication h. Xon-Xoffd. data pump i. modeme. daemon j. asynchronous communication1/ a high speed technology that can use ordinary telephone lines for downstream transmissions speeds up to 8 Mbps and upstream speeds up to 1 Mbps2/ the hardware or software portion of a modem that is responsible for converting digital data into analog signals for transmission over a telephone line3/ a hardware or software feature in modems that lets a receiving modem communicate to the sending modem that it needs more time to process previously sent data4/ an internal, automatically running program, usually in UNIX/Linux, that serves a particular function such as routing e-mail to recipients5/ a hardware device that permits a computer to exchange digital data with another computer via an analog telephone line or dedicated connection6/ communications that occur in discrete units in which the start of a unit is signaled by a start bit at the front, and a stop bit at the back signals the end of the unit7/ communications of continuous bursts or blocks of data controlled by a clock signal that starts each burst or block of data8/ a software flow control protocol that permits a receiving modem to notify the sending modem that its data buffers are full9/ an established guideline that specifies how networked data, including data sent over a telephone network, is formatted into a transmission unit10/ a digital modem device designed for use with the cable TV system providing high-speed data transfer.
Q:
___________ checking is a data verification process that ensures data integrity through a system of data bit comparisons between the sending and receiving computer.
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____________ uses digital communications over a communications line and has an aggregate data rate of 144 Kbps or 1.544 Mbps
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The _______ is a component of a modem that reads in one byte of data, adds a start and stop bit and feeds the bits to the port.
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A desktop computer with a modem is called a ________ device because it prepares data to be transmitted.
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Computers store data as a series of 1s and 0s represented by the presence or absence of _________.
Q:
What protocol does a dial-up networking connection use to access the ISP for Internet communications?a. ISDN b. UART c. PPPd. DOCSIS
Q:
When connecting to an analog modem using Windows XP, which of the following is a possible port name through which you communicate to the modem?a. COM2 b. TTY0 c. LPT1d. UART0
Q:
You have a Mac computer that you need to connect to the Internet. The only network connection available on the computer is a Bluetooth adapter. You are in range of a wi-fi hotspot that you have access to. What, if anything can you do to connect this computer to the Internet?a. Put the Bluetooth adapter in wi-fi mode and connect to the wi-fi hotspot b. configure a Bluetooth DUN on the Mac to use your Bluetooth phone's Internet connection c. create a DUN using Network and Sharing Center and connect to your Bluetooth phoned. connect to a DSL modem using Bluetooth and use PPPoE to access the Internet
Q:
You have arrived at a customer site who is having problems using a modem attached to his Linux server. The GUI is not installed on the server. Which command can you use to verify and configure the modem?a. Network Connection tool b. /dev/getty c. ln -s /dev/ttys1d. minicom
Q:
In Unix/Linux, you refer to the first modem on the computer using which of the following?a. /dev/ttys0 b. /dev/ttys1 c. /dev/com0d. /dev/com1
Q:
Data compression on modems is accomplished "on the fly" by using which of the following methods?a. PKZIP b. LZJH c. TAR-Zd. TIFF
Q:
Which of the following standards is used my modems for error checking?a. v.92bis b. v.90 c. v.42d. v.32bis
Q:
You are verifying a computer's parity checking by analyzing the bits received through a serial communication port. The system is set for even parity. Which of the following bit streams indicates a parity error?a. 100100110 b. 110000101 c. 100000001d. 111000011
Q:
You are analyzing a serial communication session. You are able to view each character as it is transmitted and received. You suspect a problem with the software flow control. Which of the following characters is involved in software flow control?a. Ctrl-S b. Ctrl-F c. Ctrl-Od. Ctrl-V
Q:
You have been called to troubleshoot a satellite Internet connection. Based on your knowledge of how satellite communications work, which of the following is NOT likely to be the cause of the problem?a. severe rain storms b. snow on the dish c. excessively bright sunlightd. heavy satellite usage
Q:
Which of the following is NOT a component in a typical satellite Internet connection?a. satellite dish b. twisted-pair cable from dish to modem c. digital modemd. USB cable from modem to computer
Q:
While considering whether to use DSL for an Internet connection, which of the following is NOT a valid consideration?a. DSL lines are dedicated to a single customer b. ADSL provides a faster downstream than upstream data rate c. DSL subscribers do not share the bandwidth with other subscribersd. only a single user can access the Internet through a DSL connection
Q:
Which of the following is true about cable modem connections.a. DOCSIS 3.0 combines multiple channels to increase speed b. upstream data rates are always lower than downstream data rates c. DOCSIS 3.0 provides added speed but not added securityd. your connection to the Internet through the cable provider is a dedicated line
Q:
When accessing the Internet through a wi-fi connection, which of the following is NOT a suggested security measure you should follow?a. use MAC address filtering b. disallow all incoming packets c. disable SSID displayd. enable the firewall
Q:
You have a laptop with a built-in analog modem. You are at a hotel and must connect to the company network with the modem. The hotel phone system requires that you dial a 9 before the phone number. You have found that it takes a second or two to get a dial-tone after you dial the 9. What command should be used on the modem to dial the number: 928-555-1932?a. dt 9285551932 b. dt 99285551932 c. atdt 9,9285551932d. atdt 99285551932
Q:
You are weighing the benefits of the major communications technologies. Your main concern is having a high bandwidth connection to the Internet. Which of the following technologies provides the highest bandwidth connections?a. ISDN PRI b. Cable modem c. ADSLd. SDSL
Q:
You are researching the possibility of upgrading your analog modem to ISDN. Which of the following is true about ISDN modems and connections?a. you can only connect one device to an incoming line b. the BRI has a data rate of 1.544 Mbps c. ISDN works only on fiber optic linesd. you can have a voice and data connection simultaneously
Q:
Which of the following is true about using software-based modems?a. they do not have a hardware UART b. they use more memory and CPU cycles than hardware-based modems c. the data pump is implemented as a software algorithmd. they cannot transfer data as fast as hardware modems
Q:
You are configuring an analog modem for a point-of-sale device and are deciding which modulation protocol to choose. Which of the following is NOT one of your choices.a. V.44 b. V.90 c. V.34d. V.92
Q:
Which of the following is NOT a component of an analog modem?a. UART b. CSMA/CD c. data pumpd. controller
Q:
The Network and Sharing Center is used in Windows Vista and Windows 7 OSs to set up a dial-up connection.
Q:
Mac OS X uses the Network Connection tool for configuring modems and other network connections.
Q:
Hardware flow control halts and resumes the movement of data by sending special characters.
Q:
A digital modem does not modulate/demodulate signals.
Q:
Analog modems are used in preference to digital technologies, even where digital technologies are widely available.
Q:
You have a server with four SCSI disks. You have just installed a fifth SCSI disk into the server. After a reboot of the system, your disk controller only recognizes three of the five disks. What is a likely cause of the problem?a. the fifth disk is the identical size and brand of one of the other disks, causing a conflict b. the new disk is dead and one of the existing disks also died c. the new disk's address conflicts with one of the other disk's addressd. SCSI can only support four disks and the fifth disk is causing the fourth disk to not work properly
Q:
You have a Windows 7 desktop computer that has a C: drive and a D: drive that are separate disks. You use the D: drive for storing data and applications. You are finding that you are almost out of disk space on the D: drive. What is a good solution to your disk space problem?a. convert the D: drive to dynamic, add a new drive and extend the D: volume onto the new drive b. buy a new disk, and convert the D: drive to a RAID volume and use disk mirroring c. backup the D: drive, reformat it and use disk encryption; restore the contents of the D: drived. extend the D: drive onto a storage area network
Q:
You are planning to buy a new laptop computer. One of your primary concerns with this laptop is that it is reliable, can take a little physical abuse, and has pretty long battery life. The data you will store on it is only a couple dozen GB. Which storage technology should you use?a. Blu-Ray discs b. SSD c. SATAd. IDE
Q:
Which of the following is NOT a Linux/Unix file or disk management command?a. cfdisk b. xfsdump c. tard. xterm
Q:
Which of the following represents a valid Linux command to mount a CD/DVD drive?a. fdisk -t /dev/cdrom iso9660 /cdrom b. mount -t udf /mnt/cdrom /cdrom c. mount -t iso9660 /dev/cdrom /cdromd. fdisk -t udf /mnt/cdrom /cdrom
Q:
You need to create new volumes and format a new disk you just installed on your Windows 7 computer. Which tool should you use?a. format b. Disk Management c. cfdiskd. Disk Utility
Q:
You have a mission-critical server that you must back up on a daily basis. You start the backup when you leave at night and the backup must be finished the next morning with no user intervention. Your server has a storage capacity of almost 2 TB. Which tape media will hold all of your server's storage on a single tape?a. DAT b. AIT c. LTOd. SDLT
Q:
Which of the following media types has the most storage capacity?a. fixed hard disk b. SSD c. Blu-Ray discd. flash drive
Q:
Which of the following is used for removable storage?a. SCSI b. iSCSI c. eSATAd. E-IDE
Q:
Which of the following statements is NOT true of cloud storage?a. storage is available through Web applications b. you connect to cloud storage using a local SAN c. most cloud storage provides fault toleranced. you can access storage through the Internet
Q:
You are building a network that will have three servers. You want the servers to have access to storage that is separate from the servers themselves but you don"t want the traffic involved with accessing the storage to affect your corporate LAN. What technology should you use?a. NAS with InfiniBand b. SAN with Fibre Channel c. DAS with iSCSId. eSATA with Ethernet
Q:
You have a music collection that you want to backup to optical media such as some type of DVD/CD. You want to be able to use the same disc to do backups each time you update your collection. Which disc type should you use?a. CD-ROM b. CD-R c. DVD-RWd. DVD+R
Q:
Which of the following is NOT a possible advantage of using RAID versus single-disk configurations?a. increased reliability b. increased speed c. fault toleranced. lower cost
Q:
Which of the following is NOT true about SSD drives compared to mechanical drives?a. they come in much larger storage configurations b. lower power requirements c. no moving parts to wear outd. faster access to data
Q:
You are building a new computer and you have just installed Windows Server 2008. You have two hard disks that you want to configure for fault tolerance using a Windows RAID configuration. How should you set up your hard disk?a. configure two volumes on each basic disk b. configure the disks as dynamic disks and create the RAID c. Reinstall using Windows Server 2008 R2 because Windows Server 2008 doesn"t support RAIDd. create the RAID using Disk Management and then convert the disks to dynamic
Q:
A friend of yours has a Mac OS X Snow Leopard computer and he has just read something about hard drives sometimes failing. He is not very familiar with his computer's built-in software and wants to know how he can back up his data. What should you tell him?a. use the Backup and Restore Wizard found in System Tools b. use the Time Machine Utility found on the Dock c. use the GUI versions of dump and cpiod. use Backup and Restore found in Disk Management
Q:
Which of the following is true about using GPT versus MBR?a. GPT supports fewer, but larger partitions b. MBR is a newer method and is only supported by a few OSs c. GPT supports larger disks than MBRd. GPT is not supported by Windows Server 2008
Q:
Your server has been running with two hard disks for the last few months. You needed additional storage so you have just installed a third disk on your SCSI interface; however, when you reboot the computer, the SCSI drives are not recognized by the system. What is a possible cause?a. you damaged the drives while installing the third diskb. you neglected to re-install the terminator after the last disk c. the power supply cannot handle the additional loadd. you can only install two disks on a SCSI system
Q:
If you want to attach six hard drives to your computer using a single disk controller interface, which interface type should you choose?a. IDE b. eSATA c. PATAd. SCSI
Q:
A Terabyte is the same as which of the following values?a. 10,000 GB b. .1 PB c. 1,000,000 MBd. 100 GB
Q:
An advantage of using tape drives for backup is that the data is accessible in random access order, making all data on the tape equally fast to retrieve.
Q:
With SAN technology, servers use a separate network to communicate with the storage device.
Q:
CD-R is just a shorthand way to write CD-ROM, but they mean the same thing.
Q:
E-IDE is a serial interface technology whereas SATA is a parallel interface technology.
Q:
Another name for the IDE hard drive interface is ATA.
Q:
What are two reasons you might want to consider using cloud storage hosted on the Internet?
Q:
What is a downside for using iSCSI for access to your NAS?
Q:
Briefly describe how data is read from a CD drives.