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207 Cards in this Set
- Front
- Back
Servers that have a NOS installed require less memory, processing power, and storage capacity that clients because servers are called on to handle only light processing loads and requests from multiple clients.
|
false |
|
The fundamental difference between a Switch and a router is that a Switch belongs only to its local network and a router belongs to two or more local networks.
|
true |
|
After a problem and its symptoms have been identified, a theory regarding a probable cause should be established. |
true |
|
Static electricity is an electrical charge in motion. |
false |
|
The protocol data unit for the Physical layer of the OSI model is payload, or data. |
false |
|
HTTP, IMAP4, FTP, and Telnet are all examples of protocols that operate at what layer of the OS model? |
layer 7 |
|
What layer of the OSI model describes how data between applications is synced and recovered if messages don't arrive intact at the receiving application? |
session layer |
|
What is the name for the protocol data unit (PDU) of the Data Link layer? |
frame |
|
The segment or datagram protocol data unit exists at what layer of the OSI model?
|
Transport layer |
|
In what network topology are devices daisy-chained together in a single line?
|
bus topology |
|
What physical network topology consists of all connected devices connecting to one central device, such as a Switch?
|
star topology |
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The device where a telecommunications service provider network ends and an organization's network begins is referred to as what option below?
|
demarc |
|
The proper handling procedures for substances such as chemical solvents is typically outlined in which of the following options?
|
MSDS |
|
An open electrical circuit as a result of a failed circuit breaker is considered to be what type of failure system?
|
FAIL-CLOSE |
|
A standard network switch operates at what layer of the OSI model?
|
layer 2 |
|
Which of the following is not one of the disadvantages of peer-to-peer networks?
|
They lack scalability. They are not necessarily secure. They are impractical for connecting large numbers of computers. They centralize user account logins |
|
Using the same network to deliver multiple types of communications services, such as video, voice, and fax, is known as:
|
convergence |
|
At what layer of the OSI model do the IP, ICMP, and ARP protocols operate?
|
network |
|
Select the layer of the OSI model that is responsible for reformatting, compressing, and/or encrypting data in a way that the application on the receiving end can read: |
presentation |
|
lf a Network layer protocol is aware that a packet is larger than the maximum size for its network, it will divide the packet into smaller packets in a process known as:
|
fragmentation |
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The process of adding a header to the data inherited from the layer above is called what option below?
|
encapsulation |
|
When using a Windows domain, what is the domain-level account for each user known as?
|
global account |
|
What mail protocol is used to send mail messages to a server?
|
smtp |
|
What is the name for a client-server model with one server and many clients, such as when an application is used to watch a live sports event?
|
multicast distribution |
|
Any Computer or device on a network that can be addressed on the local network is referred to aS a
|
node |
|
What two encryption protocols are commonly used with the Hypertext Transfer Protocol?
|
tls ssl |
|
What two mail delivery protocols below can be used by a client application to receive e-mail from a server?
|
POP3 IMAP4 |
|
Which two protocols can be used to gain remote access specifically to a server's Command line interface, securely and unsecurely?
|
Telnet Remote Desktop |
|
What are the two main Transport Layer protocols?
|
TCP UDP |
|
Static electricity can cause what two types of damage in electronic components?
|
Catastrphic failure upset failure |
|
___ is an unsecured client server application / protocol that transferS files between two computers.
|
ftp |
|
The Smallest network is a _____, which is a network of personal devices, such as the network you use when you Sync your Cellphone and your Computer.
|
Personal Area Network (PAN) |
|
The Network layer header identifies sending and receiving hosts by their___
|
IP Address |
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The centralized directory database that contains user account information and Security for the entire group of computers in a Windows domain is called ___
|
Active Directory (AD) |
|
Voice and video transmissions are _________, meaning you don't want to hear breaks in your conversation or see a buffering message when you watch a movie over the internet.
|
Delay-sensitive |
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A hexadecimal number is a number written in the base 16 number System.
|
True |
|
DNS follows a centralized database model.
|
False |
|
NetBIOS applications should be replaced as they are out-of-date.
|
True |
|
ICANN is responsible for restrictions on use of the .com, .org, and .net TLDs.
|
False |
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Each organization that provides host services on the public Internet is responsible for providing and maintaining DNS authoritative servers for public access.
|
True |
|
An IPv6 address consists of how many bits?
|
128 |
|
A port number, which identifies an application on a host, exists at what level of the OSI model?
|
Transport |
|
What are the last two parts of a host name known as?
|
Domain name |
|
What do the first 24 bits of a MAC address represent?
|
Organizationally unique Identifier (OUI) |
|
What command below can be used to display a complete summary of all network interfaces in a Windows computer?
|
ipconfig /all |
|
What top level domain is used for the air-transport industry?
|
.aero |
|
How many clusters of root servers exist?
|
13 |
|
What range of ports is referred to as the "well-known" range of ports?
|
0-1023 |
|
A loopback IP address begins with what number?
|
127 |
|
Select the IPv6 address below that indicates a global unicast address:
|
2000::/3 |
|
Which protocol below is used to make an initial connection between hosts for transferring multimedia data, relying on other protocols once a connection is established?
|
SIP |
|
The Network Time Protocol service uses what port number?
|
UDP 123 |
|
Select the name of the free, open source software that is by far the most popular DNS server Software:
|
BIND |
|
Select the protocol below that is used to synchronize clocks on computers on a network:
|
NTP |
|
When two IPv6 nodes are on the same network, they are referred to as which of the following?
|
Neighbors |
|
What utility is used to verify that TCP/IP installed, bound to the NIC, configured correctly, and Communicating with the network?
|
ping |
|
What RFC outlines recommendations for private IP addresses?
|
RFC 1918 |
|
What protocol is commonly used to request configuration files from another computer?
|
TFTP |
|
The MAC address, which is also known as the ___address, is embedded on every NIC and is assumed to be unique.
|
physical |
|
A________ is a DNS client that requests information from DNS name servers.
|
Resolver |
|
A____Consists of a host's IP address and the port number of an application running on a host, with a colon separating the two values.
|
SOCKET |
|
_______are not used to find nodes on networks other than the local network.
|
Mac Address |
|
The IP addresses 169.254.0.1 and 169.254.255.254 are both examples of_____
|
APIPA |
|
What two types of IP addresses are used on the Internet?
|
IPv4 IPv6 |
|
Traditional MAC addresses are broken into two parts. Name these two parts.
|
block ID device ID |
|
What two names are used to describe the configuration in which internal and external DNS queries are handled by different DNS servers or by a single DNS server that is specially Configured to keep internal and external DNS zones separate?
|
split dns split-horizon dns |
|
What two address prefixes for IPv6 addresses are used for unique local unicast?
|
FC00::/7 FC00::/8 |
|
What two ipConfig Commands below are used to show DNS resolver cache information and clearthe name resolver cache?
|
ipconfig /displaydns ipconfig /flushdns |
|
UDP provides error checking, but not sequencing.
|
false |
|
IP is an unreliable, connectionless protocol.
|
true |
|
IPv4 and IPv6 use the same packet format.
|
false |
|
AS a network Support technician, you only need to know how to support IPv6.
|
false |
|
On IPv4 networks, IGMP operates at the Network layer of the OSI model to manage multicasting.
|
true |
|
What is NOT one of the three characteristics of TCP in its role as a reliable delivery protocol?
|
Connection-oriented..Protocol Sequencing and checksums..Framing ..Flow Control |
|
What field in an IPv4 packet informs routers the level of precedence they should apply when processing an incoming packet? |
Differentiated Services (DiffServ) |
|
A modern ASN consists of how many bits?
|
32 |
|
What netStat command option lists only current connections, including IP addresses and port numbers?
|
-n |
|
By default, the pathping command sends how many pings per hop?
|
100 |
|
Which network routing protocol is a path vector protocol that sends updates between routers using TCP?
|
BGP |
|
What protocol replaces ARP, GMP, and ICMPv4 on IPv6 based networks?
|
ICMPv6 |
|
At what layer of the OSI model would a TCP or UDP header be added to a payload?
|
Layer 4 |
|
In a TCP segment, what field indicates how many bytes the sender can issue to a receiver while acknowledgement for the segment is outstanding?
|
Sliding Window |
|
Which of the following is not a task handled by a router?
|
A router forwards broadcasts over the network |
|
The IP connectionless protocol relies on what other protocol to guarantee delivery of data?
|
TCP |
|
What command can be used on a Cisco router to view the routing table?
|
show ip route |
|
What parameter can be combined with the traceroute command to instruct it to use ICMP echo requests instead of UDP datagrams?
|
-I |
|
What TCP field below allows the receiving node to determine whether a TCP segment is corrupted during transmission?
|
checksum |
|
What happens when a router receives a packet with a TTL of O
|
The router drops the packet and sends an ICMP TTL expired message back to the host. |
|
In IPv6, what field is used to indicate what sequence of packets from one source to one or multiple destinations a packet belongs to?
|
flow label |
|
What IPv4 protocol handles multicasting for tasks such as videoconferencing or teleconferencing?
|
IGMP |
|
What routing protocol criteria is defined as the time it takes to recognize a best path change in the event of a network outage?
|
convergence time |
|
What type of routing protocol enables routers to communicate beyond neighboring routers, allowing each router to create a map of an entire network?
|
link state |
|
The receiving host de-encapsulates the message at each layer in _____order and then presents the payload to the receiving application.
|
Reverse |
|
The TCP________ is performed before TCP transmits the actual data.
|
Three-way handshake |
|
________ 's lack of Sophistication makes it more efficient than TCP.
|
UDP |
|
ICMP (Internet Control Message Protocol) is a _______layer core protocol that reports on the Success or failure of data delivery.
|
Network |
|
A_______ joins two or more networks and passes packets from one network to another.
|
router |
|
What address does ARP work in conjunction with IPv4 to discover? (Choose two)
|
MAC PHYSICAL |
|
Which of the following are types of entries an ARP table contains? (Choose two)
|
static dynamic |
|
What versions of the IP protocol are used on networks today?
|
ipv4 ipv6 |
|
Which layers of the OSI model are all routers able to interpret? (Choose two)
|
3 and 4 |
|
What two fields below are used by IPv4 and IPv6 respectively to limit the number of times that a packet can be forwarded on a network?
|
hop limit TTL |
|
Each type of cable has a prescribed bend radius, which is the radius of the maximum arc into which you can loop a cable without impairing data transmission.
|
True |
|
A power fluctuation that results in a temporary dimming of lights is known as a blackout.
|
false |
|
The TIA/EIA standard for wall jacks in a work area require that at least one outlet be provided for data and one for voice.
|
true |
|
Cable that is coated with flame-resistant polyvinyl chloride (PVC) is acceptable for use in plenum areas.
|
false |
|
A NIC card cannot determine whether the frames it transmits and receives are using IP packets or a different layer 3 protocol, because the NIC does not operate higher than Layer 2 of the OS model.
|
true |
|
What type of power flaw involves a fluctuation in voltage levels caused by other devices on the network or by EMI?
|
noise |
|
One watt is equal to how many volt-amps?
|
1.4 |
|
What is the maximum allowable distance for horizontal wiring?
|
100m |
|
The radius of the maximum arc into which you can loop a cable without impairing data transmission is known as what option below?
|
bend radius |
|
How far away from fluorescent lights or other sources of EMI should cable be installed?
|
at least 3 feet |
|
What is the industry standard for rack height in rack units?
|
42u |
|
Which method of transmission allows signals to travel in both directions over a medium simultaneously?
|
full duplex |
|
Which method of transmission allows signals to travel in both directions over a medium but in only one direction at a time?
|
half duplex |
|
Ethernet exists at what layer of the OSI model?
|
layer 2 |
|
What is the maximum frame size for Ethernet II frames on a VLAN
|
1522 bytes |
|
When Selecting a punch down block, what block type is more suitable for data connections?
|
110 block |
|
What Component of the backbone runs between a building's floors and can be used to connect an MDF and IDF or multiple IDFs?
|
vertical cross connect |
|
Where is a demarc located in relation to the structured cabling of an enterprise environment?
|
Main distribution frame (MDF) |
|
The room where the_____ is located is called the data closet.
|
MDF |
|
____ are highly scalable and have a very high fault tolerance, massive storage capabilities, and fast data access.
|
SAN |
|
A _______allows for an MTU as high as 9198 bytes.
|
Jumbo Frame |
|
To ensure that any ______are detected, frames are made large enough to fill the entire cable during transmission.
|
collisions |
|
Digital signals are composed of pulses of precise, positive voltages and zero voltages.
|
true |
|
A serial cable with an RJ-45 connector is capable of being used through an RJ-45 Ethernet port.
|
false |
|
Multimode fiber contains a core that is larger than a single mode fiber core.
|
true |
|
Because digital signals do not depend on amplitude or frequency differences to communicate information, they are more vulnerable to EMI noise.
|
false |
|
A continuity tester should not be used on a live network segment.
|
true |
|
Using DWDM, a single fiber can carry between what two numbers of channels?
|
80 - 160 |
|
What two items below are commonly expressed as bits transmitted per second?
|
bandwidth throughput |
|
What two connector types are typically used to terminate RG-6 and RG-59 cables?
|
f-connectors BNC |
|
Frequencies used to Convey speech over telephone lines fall between what two frequencies below?
|
300 hz - 3.3 khz |
|
What is the maximum supported throughput and bandwidth/signal rate of Cat5e?
|
1000mbps or 1gb |
|
A____ is a voltage, frequency, pulse, or phase change in an analog transmission.
|
symbol |
|
A _________cable reverses all of the wires without regard to how they are paired.
|
rollover |
|
_________Causes problems only when a receiving node is expecting some type of Communication, Such as the rest of the data stream it has begun to accept. |
Latency |
|
A__________ is a simple instrument that can measure many characteristics of an electric circuit, including its resistance, voltage, and impedance.
|
multimeter |
|
A_________ is a device that retransmits a digital signal in its original form, extending the length of a segment.
|
repeater |
|
What term below is used to describe the outer-most layer of protective covering of a coaxial cable?
|
sheath |
|
What Ethernet standard below is also referred to as "thinnet"?
|
10base2 |
|
Select the component of enterprise level structured cabling that serves as the location where an incoming network interface enters a building and connects with the building's backbone cabling:
|
entrance facility |
|
During termination of twisted pair cabling, what should be done to ensure minimal cross talk is introduced?
|
no more than 1 inch of the cable should be exposed. |
|
What cable type comes in two different modes, single mode and multimode?
|
Fiber optic |
|
Which of the following options is not a likely source of electromagnetic interference?
|
Fiber optic cables |
|
in order to simplify console access to Computers in a rack, what device is typically used to provide a central portal for all devices on the rack?
|
KVM switch |
|
If the use of a pre-existing Ethernet infrastructure is desired for a SAN, what Transport Layer protocol should be utilized?
|
iSCSI |
|
What type of power Converter changes the voltage of an AC current, such as when power over the main line from an electric company is changed before being delivered to a home?
|
transformer |
|
Select the two terms below that are used to describe a UPS that provides continuous voltage to a device by Switching virtually instantaneously to the battery when it detects a loss of power:
|
standby UPS failover power supply |
|
The Standard that describes uniform, enterprise-wide cabling systems, regardless of who manufactures or Sells the various parts used in the system, can be referred to by what two options below?
|
TIA/EIA-568 IEEE Commercial Building Wiring Standard |
|
Equipment racks most commonly come in what two widths?
|
19 inch frame 23 inch frame |
|
Select the two Transport Layer protocols that are used by SANs:
|
iSCSI Fibre Channel |
|
Select the maximum allowable distances for horizontal wiring for a span that connects a data jack on a Wall to a data closet, and for a span that connects a workstation to the data jack, respectively:
|
90m 10m |
|
A volt-ampere (VA) is the product of the voltage and the_________ of the electricity on a line.
|
current |
|
The most common multiplexing technology used in conjunction with fiber optics is which option below?
|
DWDM |
|
A device that is responsible for modulating digital signals into analog signals, and demodulating analog signals into digital signals at the receiving end, is known as?
|
A modem |
|
Ethernet is an example of what type of technology?
|
baseband |
|
Since cable TV and cable Internet can share the same coaxial cable, they are considered to be what type of technology?
|
broadband |
|
Using a form of transmission that allows multiple signals to travel simultaneously over one medium is known as which of the following options?
|
multiplexing |
|
All wireless signals are carried through the air by electromagnetic waves.
|
true |
|
Unlike wired signals, wireless signals originate from electrical current traveling along a Capacitor.
|
false |
|
Multipath signaling is a significant cause of fading.
|
True |
|
NFC tags are very expensive and cannot be purchased blank, requiring them to be pre-loaded.
|
False |
|
The WPS PIN is vulnerable to brute force attacks.
|
true |
|
What signal propagation phenomena causes a wireless signal to split into secondary waves when it encounters an obstruction?
|
diffraction |
|
What signal propagation phenomena causes the diffusion, or the reflection in multiple different directions, of a signal?
|
scattering |
|
Which command below can be used on Linux to modify the SSID of the access point you choose to associate with?
|
iwconfig |
|
How many address fields exist in an 802.11 frame?
|
4 |
|
What is the minimum category of UTP cable required in order to support Gigabit speeds?
|
cat 5e |
|
What is the maximum supported throughput of a CAT6 cable?
|
10 Gbps |
|
How many cable pairs are needed for 1000Base-T transmission over CAT5e cable?
|
4 |
|
Standard PoE devices must be provided with how much power in order to function?
|
15.4 watts |
|
What is the maximum distance for 10GBase-ER and 10GBase-EW on a segment of single mode fiber?
|
40km |
|
What type of Cross-talk occurs between wire pairs near the source of a signal?
|
near end cross talk |
|
Which of the following connectors is the most common for multimode fiber?
|
MT-RJ |
|
A measure of a signal's strength at any given time is known as which term below?
|
amplitude |
|
The number of times that a wave's amplitude cycles from its starting point, through its highest amplitude and its lowest amplitude, and back to its starting point over a fixed period of time, is known as what term below?
|
frequency |
|
WDM divides a beam of light into how many different wavelengths or colors?
|
40 |
|
Which type of multiplexing is defined by wavelength instead of frequency?
|
CWDM |
|
Which option below reflects the standard impedance of an RG-6 cable?
|
75 ohms |
|
Phone companies make use of what type of multiplexing in order to allow for phone services and DSL services over the same line?
|
FDM |
|
Select below the band that is not one of the four frequency bands used in the 5 GHz range for WirelesS LANS:
5.1 ghz 5.3 ghz 5.4 ghz 5.9 ghz |
5.9 ghz |
|
Which of the following is not a valid wireless network topology?
bus infrastructure mesh ad hoc |
bus |
|
ldeally, Stations must remain within what range of an access point in order to maintain optimal transmission speeds?
|
300 feet |
|
At what layer of the OSI model do the 802.11 standards vary?
|
physical layer |
|
Which 802.11 standard was the first to utilize the 5 GHz band?
|
802.11a |
|
Which 802.11 technology is the first Wi-Fi standard to approach gigabit Ethernet capabilities, and operates on the 5 GHz band?
|
802.11ac |
|
What is the maximum theoretical throughput of 802.11n?
|
600 mbps |
|
What is the name for the special signal that contains information that a wireless node requires in order to associate itself with an access point?
|
beacon frame |
|
In IEEE terminology, a group of Stations that share an access point are said to be part of what option below?
|
basic service set |
|
What 802.11 frame type is involved in association and reassociation, including probe and beacon frames?
|
management frames |
|
Which 802.11 frame type is related to medium access and data delivery, and includes ACK and RTS/CTS frames?
|
control frames |
|
How does the 802.11 data frame indicate how a large packet should be fragmented?
|
The sequence control field indicates how packets will be subdivided |
|
Which 802.11 wireless innovation allows for the use of multiple antennas on an access point that can issue a signal to one or more receivers?
|
MIMO |
|
In an 802.11 data frame, what is the size of the frame check sequence field?
|
6 bytes |
|
How many data streams are used in 802.11ac Wave 2 devices?
|
4 data streams |
|
What is the max theoretical throughput of the 802.11ac wireless technology when using Wave 1 devices?
|
1.3 gbps |
|
The wireless spectrum, as defined by the FCC, spans between which two frequencies?
|
9 khz - 300 ghz |
|
What two frequencies are used for most wireless networks?
|
2.4 ghz 5 ghz |
|
At which two layers do wireless LANs operate?
|
layer 1 and layer 2 |
|
Which of the following are two different types of attacks against Bluetooth connections that can be used to send unsolicited data, or download data without permission?
|
bluejacking bluesnarfing |
|
What two terms describe a wireless network topology in which access points work as peer devices on the same network? |
mesh WLAN wireless mesh network (wmn) |
|
________is an outdated wireless technology that has been mostly replaced by Bluetooth to connect personal devices. |
infrared |
|
The proportion of noise to the strength of a signal is called the___________ |
SNR (signal to noise ratio) |
|
Access points that include routing functions are also called__________ |
routers |
|
____________is a form of radio communication that transfers data wirelessly over very short distances (usually 10 cm or less).
|
NFC |
|
All 802.11 standards use___________ signaling, meaning a wireless station can only transmit or receive, but cannot do both simultaneously. |
half duplex |