Network Mid Term

Front 1

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.

Back 1

false

Front 2

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.

Back 2

true

Front 3

After a problem and its symptoms have been identified, a theory regarding a probable cause should be established.

Back 3

true

Front 4

Static electricity is an electrical charge in motion.

Back 4

false

Front 5

The protocol data unit for the Physical layer of the OSI model is payload, or data.

Back 5

false

Front 6

HTTP, IMAP4, FTP, and Telnet are all examples of protocols that operate at what layer of the OS model?

Back 6

layer 7

Front 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?

Back 7

session layer

Front 8

What is the name for the protocol data unit (PDU) of the Data Link layer?

Back 8

frame

Front 9

The segment or datagram protocol data unit exists at what layer of the OSI model?

Back 9

Transport layer

Front 10

In what network topology are devices daisy-chained together in a single line?

Back 10

bus topology

Front 11

What physical network topology consists of all connected devices connecting to one central device, such as a Switch?

Back 11

star topology

Front 12

The device where a telecommunications service provider network ends and an organization's network begins is referred to as what option below?

Back 12

demarc

Front 13

The proper handling procedures for substances such as chemical solvents is typically outlined in which of the following options?

Back 13

MSDS

Front 14

An open electrical circuit as a result of a failed circuit breaker is considered to be what type of failure system?

Back 14

FAIL-CLOSE

Front 15

A standard network switch operates at what layer of the OSI model?

Back 15

layer 2

Front 16

Which of the following is not one of the disadvantages of peer-to-peer networks?

Back 16

They lack scalability. They are not necessarily secure. They are impractical for connecting large numbers of computers. They centralize user account logins

Front 17

Using the same network to deliver multiple types of communications services, such as video, voice, and fax, is known as:

Back 17

convergence

Front 18

At what layer of the OSI model do the IP, ICMP, and ARP protocols operate?

Back 18

network

Front 19

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:

Back 19

presentation

Front 20

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:

Back 20

fragmentation

Front 21

The process of adding a header to the data inherited from the layer above is called what option below?

Back 21

encapsulation

Front 22

When using a Windows domain, what is the domain-level account for each user known as?

Back 22

global account

Front 23

What mail protocol is used to send mail messages to a server?

Back 23

smtp

Front 24

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?

Back 24

multicast distribution

Front 25

Any Computer or device on a network that can be addressed on the local network is referred to aS a

Back 25

node

Front 26

What two encryption protocols are commonly used with the Hypertext Transfer Protocol?

Back 26

tls

ssl

Front 27

What two mail delivery protocols below can be used by a client application to receive e-mail from a server?

Back 27

POP3

IMAP4

Front 28

Which two protocols can be used to gain remote access specifically to a server's Command line interface, securely and unsecurely?

Back 28

Telnet

Remote Desktop

Front 29

What are the two main Transport Layer protocols?

Back 29

TCP

UDP

Front 30

Static electricity can cause what two types of damage in electronic components?

Back 30

Catastrphic failure

upset failure

Front 31

___ is an unsecured client server application / protocol that transferS files between two computers.

Back 31

ftp

Front 32

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.

Back 32

Personal Area Network (PAN)

Front 33

The Network layer header identifies sending and receiving hosts by their___

Back 33

IP Address

Front 34

The centralized directory database that contains user account information and Security for the entire group of computers in a Windows domain is called ___

Back 34

Active Directory (AD)

Front 35

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.

Back 35

Delay-sensitive

Front 36

A hexadecimal number is a number written in the base 16 number System.

Back 36

True

Front 37

DNS follows a centralized database model.

Back 37

False

Front 38

NetBIOS applications should be replaced as they are out-of-date.

Back 38

True

Front 39

ICANN is responsible for restrictions on use of the .com, .org, and .net TLDs.

Back 39

False

Front 40

Each organization that provides host services on the public Internet is responsible for providing and maintaining DNS authoritative servers for public access.

Back 40

True

Front 41

An IPv6 address consists of how many bits?

Back 41

128

Front 42

A port number, which identifies an application on a host, exists at what level of the OSI model?

Back 42

Transport

Front 43

What are the last two parts of a host name known as?

Back 43

Domain name

Front 44

What do the first 24 bits of a MAC address represent?

Back 44

Organizationally unique Identifier (OUI)

Front 45

What command below can be used to display a complete summary of all network interfaces in a Windows computer?

Back 45

ipconfig /all

Front 46

What top level domain is used for the air-transport industry?

Back 46

.aero

Front 47

How many clusters of root servers exist?

Back 47

13

Front 48

What range of ports is referred to as the "well-known" range of ports?

Back 48

0-1023

Front 49

A loopback IP address begins with what number?

Back 49

127

Front 50

Select the IPv6 address below that indicates a global unicast address:

Back 50

2000::/3

Front 51

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?

Back 51

SIP

Front 52

The Network Time Protocol service uses what port number?

Back 52

UDP 123

Front 53

Select the name of the free, open source software that is by far the most popular DNS server Software:

Back 53

BIND

Front 54

Select the protocol below that is used to synchronize clocks on computers on a network:

Back 54

NTP

Front 55

When two IPv6 nodes are on the same network, they are referred to as which of the following?

Back 55

Neighbors

Front 56

What utility is used to verify that TCP/IP installed, bound to the NIC, configured correctly, and Communicating with the network?

Back 56

ping

Front 57

What RFC outlines recommendations for private IP addresses?

Back 57

RFC 1918

Front 58

What protocol is commonly used to request configuration files from another computer?

Back 58

TFTP

Front 59

The MAC address, which is also known as the ___address, is embedded on every NIC and is assumed to be unique.

Back 59

physical

Front 60

A________ is a DNS client that requests information from DNS name servers.

Back 60

Resolver

Front 61

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.

Back 61

SOCKET

Front 62

_______are not used to find nodes on networks other than the local network.

Back 62

Mac Address

Front 63

The IP addresses 169.254.0.1 and 169.254.255.254 are both examples of_____

Back 63

APIPA

Front 64

What two types of IP addresses are used on the Internet?

Back 64

IPv4

IPv6

Front 65

Traditional MAC addresses are broken into two parts. Name these two parts.

Back 65

block ID

device ID

Front 66

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?

Back 66

split dns

split-horizon dns

Front 67

What two address prefixes for IPv6 addresses are used for unique local unicast?

Back 67

FC00::/7

FC00::/8

Front 68

What two ipConfig Commands below are used to show DNS resolver cache information and clearthe name resolver cache?

Back 68

ipconfig /displaydns

ipconfig /flushdns

Front 69

UDP provides error checking, but not sequencing.

Back 69

false

Front 70

IP is an unreliable, connectionless protocol.

Back 70

true

Front 71

IPv4 and IPv6 use the same packet format.

Back 71

false

Front 72

AS a network Support technician, you only need to know how to support IPv6.

Back 72

false

Front 73

On IPv4 networks, IGMP operates at the Network layer of the OSI model to manage multicasting.

Back 73

true

Front 74

What is NOT one of the three characteristics of TCP in its role as a reliable delivery protocol?

Back 74

Connection-oriented..Protocol Sequencing and checksums..Framing ..Flow Control

Front 75

What field in an IPv4 packet informs routers the level of precedence they should apply when processing an incoming packet?

Back 75

Differentiated Services (DiffServ)

Front 76

A modern ASN consists of how many bits?

Back 76

32

Front 77

What netStat command option lists only current connections, including IP addresses and port numbers?

Back 77

-n

Front 78

By default, the pathping command sends how many pings per hop?

Back 78

100

Front 79

Which network routing protocol is a path vector protocol that sends updates between routers using TCP?

Back 79

BGP

Front 80

What protocol replaces ARP, GMP, and ICMPv4 on IPv6 based networks?

Back 80

ICMPv6

Front 81

At what layer of the OSI model would a TCP or UDP header be added to a payload?

Back 81

Layer 4

Front 82

In a TCP segment, what field indicates how many bytes the sender can issue to a receiver while acknowledgement for the segment is outstanding?

Back 82

Sliding Window

Front 83

Which of the following is not a task handled by a router?

Back 83

A router forwards broadcasts over the network

Front 84

The IP connectionless protocol relies on what other protocol to guarantee delivery of data?

Back 84

TCP

Front 85

What command can be used on a Cisco router to view the routing table?

Back 85

show ip route

Front 86

What parameter can be combined with the traceroute command to instruct it to use ICMP echo requests instead of UDP datagrams?

Back 86

-I

Front 87

What TCP field below allows the receiving node to determine whether a TCP segment is corrupted during transmission?

Back 87

checksum

Front 88

What happens when a router receives a packet with a TTL of O

Back 88

The router drops the packet and sends an ICMP TTL expired message back to the host.

Front 89

In IPv6, what field is used to indicate what sequence of packets from one source to one or multiple destinations a packet belongs to?

Back 89

flow label

Front 90

What IPv4 protocol handles multicasting for tasks such as videoconferencing or teleconferencing?

Back 90

IGMP

Front 91

What routing protocol criteria is defined as the time it takes to recognize a best path change in the event of a network outage?

Back 91

convergence time

Front 92

What type of routing protocol enables routers to communicate beyond neighboring routers, allowing each router to create a map of an entire network?

Back 92

link state

Front 93

The receiving host de-encapsulates the message at each layer in _____order and then presents the payload to the receiving application.

Back 93

Reverse

Front 94

The TCP________ is performed before TCP transmits the actual data.

Back 94

Three-way handshake

Front 95

________ 's lack of Sophistication makes it more efficient than TCP.

Back 95

UDP

Front 96

ICMP (Internet Control Message Protocol) is a _______layer core protocol that reports on the Success or failure of data delivery.

Back 96

Network

Front 97

A_______ joins two or more networks and passes packets from one network to another.

Back 97

router

Front 98

What address does ARP work in conjunction with IPv4 to discover? (Choose two)

Back 98

MAC

PHYSICAL

Front 99

Which of the following are types of entries an ARP table contains? (Choose two)

Back 99

static

dynamic

Front 100

What versions of the IP protocol are used on networks today?

Back 100

ipv4

ipv6

Front 101

Which layers of the OSI model are all routers able to interpret? (Choose two)

Back 101

3 and 4

Front 102

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?

Back 102

hop limit

TTL

Front 103

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.

Back 103

True

Front 104

A power fluctuation that results in a temporary dimming of lights is known as a blackout.

Back 104

false

Front 105

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.

Back 105

true

Front 106

Cable that is coated with flame-resistant polyvinyl chloride (PVC) is acceptable for use in plenum areas.

Back 106

false

Front 107

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.

Back 107

true

Front 108

What type of power flaw involves a fluctuation in voltage levels caused by other devices on the network or by EMI?

Back 108

noise

Front 109

One watt is equal to how many volt-amps?

Back 109

1.4

Front 110

What is the maximum allowable distance for horizontal wiring?

Back 110

100m

Front 111

The radius of the maximum arc into which you can loop a cable without impairing data transmission is known as what option below?

Back 111

bend radius

Front 112

How far away from fluorescent lights or other sources of EMI should cable be installed?

Back 112

at least 3 feet

Front 113

What is the industry standard for rack height in rack units?

Back 113

42u

Front 114

Which method of transmission allows signals to travel in both directions over a medium simultaneously?

Back 114

full duplex

Front 115

Which method of transmission allows signals to travel in both directions over a medium but in only one direction at a time?

Back 115

half duplex

Front 116

Ethernet exists at what layer of the OSI model?

Back 116

layer 2

Front 117

What is the maximum frame size for Ethernet II frames on a VLAN

Back 117

1522 bytes

Front 118

When Selecting a punch down block, what block type is more suitable for data connections?

Back 118

110 block

Front 119

What Component of the backbone runs between a building's floors and can be used to connect an MDF and IDF or multiple IDFs?

Back 119

vertical cross connect

Front 120

Where is a demarc located in relation to the structured cabling of an enterprise environment?

Back 120

Main distribution frame (MDF)

Front 121

The room where the_____ is located is called the data closet.

Back 121

MDF

Front 122

____ are highly scalable and have a very high fault tolerance, massive storage capabilities, and fast data access.

Back 122

SAN

Front 123

A _______allows for an MTU as high as 9198 bytes.

Back 123

Jumbo Frame

Front 124

To ensure that any ______are detected, frames are made large enough to fill the entire cable during transmission.

Back 124

collisions

Front 125

Digital signals are composed of pulses of precise, positive voltages and zero voltages.

Back 125

true

Front 126

A serial cable with an RJ-45 connector is capable of being used through an RJ-45 Ethernet port.

Back 126

false

Front 127

Multimode fiber contains a core that is larger than a single mode fiber core.

Back 127

true

Front 128

Because digital signals do not depend on amplitude or frequency differences to communicate information, they are more vulnerable to EMI noise.

Back 128

false

Front 129

A continuity tester should not be used on a live network segment.

Back 129

true

Front 130

Using DWDM, a single fiber can carry between what two numbers of channels?

Back 130

80 - 160

Front 131

What two items below are commonly expressed as bits transmitted per second?

Back 131

bandwidth

throughput

Front 132

What two connector types are typically used to terminate RG-6 and RG-59 cables?

Back 132

f-connectors

BNC

Front 133

Frequencies used to Convey speech over telephone lines fall between what two frequencies below?

Back 133

300 hz - 3.3 khz

Front 134

What is the maximum supported throughput and bandwidth/signal rate of Cat5e?

Back 134

1000mbps or 1gb

Front 135

A____ is a voltage, frequency, pulse, or phase change in an analog transmission.

Back 135

symbol

Front 136

A _________cable reverses all of the wires without regard to how they are paired.

Back 136

rollover

Front 137

_________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.

Back 137

Latency

Front 138

A__________ is a simple instrument that can measure many characteristics of an electric circuit, including its resistance, voltage, and impedance.

Back 138

multimeter

Front 139

A_________ is a device that retransmits a digital signal in its original form, extending the length of a segment.

Back 139

repeater

Front 140

What term below is used to describe the outer-most layer of protective covering of a coaxial cable?

Back 140

sheath

Front 141

What Ethernet standard below is also referred to as "thinnet"?

Back 141

10base2

Front 142

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:

Back 142

entrance facility

Front 143

During termination of twisted pair cabling, what should be done to ensure minimal cross talk is introduced?

Back 143

no more than 1 inch of the cable should be exposed.

Front 144

What cable type comes in two different modes, single mode and multimode?

Back 144

Fiber optic

Front 145

Which of the following options is not a likely source of electromagnetic interference?

Back 145

Fiber optic cables

Front 146

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?

Back 146

KVM switch

Front 147

If the use of a pre-existing Ethernet infrastructure is desired for a SAN, what Transport Layer protocol should be utilized?

Back 147

iSCSI

Front 148

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?

Back 148

transformer

Front 149

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:

Back 149

standby UPS

failover power supply

Front 150

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?

Back 150

TIA/EIA-568

IEEE Commercial Building Wiring Standard

Front 151

Equipment racks most commonly come in what two widths?

Back 151

19 inch frame

23 inch frame

Front 152

Select the two Transport Layer protocols that are used by SANs:

Back 152

iSCSI

Fibre Channel

Front 153

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:

Back 153

90m

10m

Front 154

A volt-ampere (VA) is the product of the voltage and the_________ of the electricity on a line.

Back 154

current

Front 155

The most common multiplexing technology used in conjunction with fiber optics is which option below?

Back 155

DWDM

Front 156

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?

Back 156

A modem

Front 157

Ethernet is an example of what type of technology?

Back 157

baseband

Front 158

Since cable TV and cable Internet can share the same coaxial cable, they are considered to be what type of technology?

Back 158

broadband

Front 159

Using a form of transmission that allows multiple signals to travel simultaneously over one medium is known as which of the following options?

Back 159

multiplexing

Front 160

All wireless signals are carried through the air by electromagnetic waves.

Back 160

true

Front 161

Unlike wired signals, wireless signals originate from electrical current traveling along a Capacitor.

Back 161

false

Front 162

Multipath signaling is a significant cause of fading.

Back 162

True

Front 163

NFC tags are very expensive and cannot be purchased blank, requiring them to be pre-loaded.

Back 163

False

Front 164

The WPS PIN is vulnerable to brute force attacks.

Back 164

true

Front 165

What signal propagation phenomena causes a wireless signal to split into secondary waves when it encounters an obstruction?

Back 165

diffraction

Front 166

What signal propagation phenomena causes the diffusion, or the reflection in multiple different directions, of a signal?

Back 166

scattering

Front 167

Which command below can be used on Linux to modify the SSID of the access point you choose to associate with?

Back 167

iwconfig

Front 168

How many address fields exist in an 802.11 frame?

Back 168

4

Front 169

What is the minimum category of UTP cable required in order to support Gigabit speeds?

Back 169

cat 5e

Front 170

What is the maximum supported throughput of a CAT6 cable?

Back 170

10 Gbps

Front 171

How many cable pairs are needed for 1000Base-T transmission over CAT5e cable?

Back 171

4

Front 172

Standard PoE devices must be provided with how much power in order to function?

Back 172

15.4 watts

Front 173

What is the maximum distance for 10GBase-ER and 10GBase-EW on a segment of single mode fiber?

Back 173

40km

Front 174

What type of Cross-talk occurs between wire pairs near the source of a signal?

Back 174

near end cross talk

Front 175

Which of the following connectors is the most common for multimode fiber?

Back 175

MT-RJ

Front 176

A measure of a signal's strength at any given time is known as which term below?

Back 176

amplitude

Front 177

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?

Back 177

frequency

Front 178

WDM divides a beam of light into how many different wavelengths or colors?

Back 178

40

Front 179

Which type of multiplexing is defined by wavelength instead of frequency?

Back 179

CWDM

Front 180

Which option below reflects the standard impedance of an RG-6 cable?

Back 180

75 ohms

Front 181

Phone companies make use of what type of multiplexing in order to allow for phone services and DSL services over the same line?

Back 181

FDM

Front 182

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

Back 182

5.9 ghz

Front 183

Which of the following is not a valid wireless network topology?

bus

infrastructure

mesh

ad hoc

Back 183

bus

Front 184

ldeally, Stations must remain within what range of an access point in order to maintain optimal transmission speeds?

Back 184

300 feet

Front 185

At what layer of the OSI model do the 802.11 standards vary?

Back 185

physical layer

Front 186

Which 802.11 standard was the first to utilize the 5 GHz band?

Back 186

802.11a

Front 187

Which 802.11 technology is the first Wi-Fi standard to approach gigabit Ethernet capabilities, and operates on the 5 GHz band?

Back 187

802.11ac

Front 188

What is the maximum theoretical throughput of 802.11n?

Back 188

600 mbps

Front 189

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?

Back 189

beacon frame

Front 190

In IEEE terminology, a group of Stations that share an access point are said to be part of what option below?

Back 190

basic service set

Front 191

What 802.11 frame type is involved in association and reassociation, including probe and beacon frames?

Back 191

management frames

Front 192

Which 802.11 frame type is related to medium access and data delivery, and includes ACK and RTS/CTS frames?

Back 192

control frames

Front 193

How does the 802.11 data frame indicate how a large packet should be fragmented?

Back 193

The sequence control field indicates how packets will be subdivided

Front 194

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?

Back 194

MIMO

Front 195

In an 802.11 data frame, what is the size of the frame check sequence field?

Back 195

6 bytes

Front 196

How many data streams are used in 802.11ac Wave 2 devices?

Back 196

4 data streams

Front 197

What is the max theoretical throughput of the 802.11ac wireless technology when using Wave 1 devices?

Back 197

1.3 gbps

Front 198

The wireless spectrum, as defined by the FCC, spans between which two frequencies?

Back 198

9 khz - 300 ghz

Front 199

What two frequencies are used for most wireless networks?

Back 199

2.4 ghz

5 ghz

Front 200

At which two layers do wireless LANs operate?

Back 200

layer 1 and layer 2

Front 201

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?

Back 201

bluejacking

bluesnarfing

Front 202

What two terms describe a wireless network topology in which access points work as peer devices on the same network?

Back 202

mesh WLAN

wireless mesh network (wmn)

Front 203

________is an outdated wireless technology that has been mostly replaced by Bluetooth to connect personal devices.

Back 203

infrared

Front 204

The proportion of noise to the strength of a signal is called the___________

Back 204

SNR (signal to noise ratio)

Front 205

Access points that include routing functions are also called__________

Back 205

routers

Front 206

____________is a form of radio communication that transfers data wirelessly over very short distances (usually 10 cm or less).

Back 206

NFC

Front 207

All 802.11 standards use___________ signaling, meaning a wireless station can only transmit or receive, but cannot do both simultaneously.

Back 207

half duplex