When Troubleshooting Wireless Issues What Statement Is Accurate

Question: In an 802.11 data frame, what is the maximum amount of data that can be sent?

Answer: 2312 bytes

Question: When using RFID, what is an ARPT (Active Reader Passive Tag)?

Answer: It is a tag that is activated by an active reader, and uses power from the reader's radio to power its transmission.

Question: When troubleshooting wireless issues, what statement is accurate?

Answer: Access points that use overlapping channels can cause interference with each other if they are too close.

Question: The Border Gateway Protocol is considered to be a hybrid routing protocol. (T or F)

Answer: TRUE

Question: If the VLAN tag is present in an Ethernet frame, what is the maximum frame size?

Answer: 1522 bytes

Question: What utility is the equivialent to the pathping command on a Linux system?

Answer: mtr

Question: The 1000Base-LX utilizes light with what wavelength?

Answer: 1300 Nanometers

Question: A junior administrator is having issues connecting to a router's console port using a TIA/EIA 568B standard cable and a USB serial to RJ-45 adapter, despite verifying terminal settings. What is the issue?

Answer: The cable must be a rollover cable.

Question: What is the industry standard angle for an Angle Polished Connector (APC)?

Answer: 8 degrees

Question: What is the earliest twisted-pair cabling standard that meets the minimum requirements for 10GBase-T transmissions?

Answer: Cat 6a

Question: What technology does Bluetooth use to take advantage of the 79 channels allocated to the Bluetooth band?

Answer: FHSS

Question: Which one of the following wireless transmission types requires a clear LOS to function?

Answer: Infrared

Question: In an 802.11 data frame, what is the maximum amount of data that can be sent?

Answer: 2312 bytes

Question: Which Carrier Sense technology is used on wireless networks to reduce collisions?

Answer: CSMA/CA

Question: Healing messages are a feature of what smart home protocol?

Answer: Z-Wave

Question: Why should you terminate coaxial cable with connectors that are rated for the exact cable type?

Answer: A mismatched connector will have different impedance ratings, causing data errors.

Question: When a router can't determine a path to a message's destination, where does it send the message?

Answer: Gateway of last resort

Question: Which routing protocol does an exterior router use to collect data to build its routing tables?

Answer: BGP

Question: What field in a TCP segment is used to determine if an arriving data unit exactly matches the data unit sent by the source?

Answer: Checksum

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

Answer: Differentiated Services (DiffServ)

Question: Which statement does NOT accurately describe characteristics of the OSPF protocol?

Answer: OSPF requires very little CPU or memory resources

Question: UDP provides error checking, but not sequencing (T or F)

Answer: FALSE

Question: A wireless node that is in active scanning mode transmits what special type of frame in order to find available access points?

Answer: Probe frame

Question: The LLC sublayer is primarily concerned with managing MAC addresses in message frames. (False)

Answer: FALSE

Question: At what layer of the OSI Model do the 802.11 standards vary?

Answer: Physical layer

Question: What is the purpose of the Layer 2 LLC sublayer?

Answer: It is used to handle multiplexing, flow and error control, and reliability

Question: Suppose you're creating patch cables to be used in a government office. What color wire goes in the first pin?

Answer: White/Green

Question: What type of fiber cable problem is caused when pairing a 50-micron core cable with a 62.5-micron core cable?

Answer: Fiber type mismatch

Question: In a coaxial cabling, what does the RG rating measure?

Answer: The materials used for shielding and conducting cores

Question: Which command will produce statistics about each message transmitted by a host, separated according to protocol type?

Answer: Netstat -s

Question: You are connected to your network's Cisco router, and need to verify the route table. What command should you enter?

Answer: show ip route

Question: A user swipes her smartphone across a tag on a poster to obtain showtimes for a movie she wants to see later that evening. What wireless technology transmitted the data?

Answer: NFC

Question: You are troubleshooting a client's wireless networking issue. Which of the following will prevent the client from connecting to the network?

Answer: The client has a wireless profile configured for the "campus" SSID, but the access point is broadcasting the "CAMPUS" SSID.

Question: Signals that can travel in only one direction on a medium are referred to as what type of signal?

Answer: Simplex

Question: What multiplexing technology lowers cost by spacing frequency bands wider apart to allow for cheaper transceiver equipment?

Answer: coarse wavelength division multiplexing

Question: In order to achieve 1000Base-T over CAT5e cable, 2 pairs of copper are needed.

Answer: FALSE

Question: What is the maximum supported throughput of a CAT6 cable?

Answer: 10 Gbps

Question: Routing protocols that enable routers to communicate beyond neighboring routers, allowing each router to independently map the network, are known as which type of protocols?

Answer: Link-state protocols

Question: IP is an unreliable, connectionless protocol, as it does not establish a session to send its packets.

Answer: TRUE

Question: What tcpdump command can be used to filter out all traffic except SSH traffic?

Answer: TCPDump port 22

Question: The 802.11 standard specifies the use of what technique in order to minimize the potential for collisions?

Answer: Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)

Question: How does refraction affect the propagation of a wireless transmission?

Answer: It distorts the signal as it travels into and through a different transmission medium.

Question: A hacker takes advantage of an open Bluetooth connection to send a virus to a user's smartphone. What kind of security breach has occurred?

Answer: Bluesnarfing

Question: Which of the following statements about fiber-optic cabling is accurate?

Answer: Light experiences virtually no resistance when traveling through glass.

Question: Telephone connections follow what registered jack standard?

Answer: registered jack 11 (RJ-11)

Question: Both 10GBase-ER and 10GBase-EW have what maximum distance limitation on a segment of single mode fiber?

Answer: 40km

Question: When troubleshooting wireless issues, what statement is accurate?

Answer: Access points that use overlapping channels can cause interference with each other if they are too close.

Question: Z-Wave transmissions have a range of up to 50m per hop, and can tolerate up to 8 hops through repeaters.

Answer: FALSE

Question: Healing messages are a feature of what smart home protocol?

Answer: Z-Wave

Question: The 802.11 standard specifies the use of what technique in order to minimize the potential for collisions?

Answer: Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)

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

Answer: 4 data streams

Question: The pathping utility sends 10 pings per hop by default.

Answer: FALSE

Question: You have been awarded a contract for wiring a new federal building. What twisted-pair wiring standard must you use?

Answer: . TIA/EIA 568A

Question: RG-59 is more expensive than RG-6, but has better resistance to attenuation.

Answer: FALSE

Question: A junior administrator is having issues connecting to a router's console port using a TIA/EIA 568B standard cable and a USB serial to RJ-45 adapter, despite verifying terminal settings. What is the issue?

Answer: The cable must be a rollover cable.

Question: Which of the following statements regarding the 802.11ac standard is NOT accurate?

Answer: 802.11ac operates on the 5-GHz band.

Question: Infrared technology utilizes an LED that emits light with shorter wavelengths than red light.

Answer: FALSE

Question: Originally codified by ISO, what does the "intermediate system" in IS-IS (Intermediate System to Intermediate System) stand for?

Answer: An IS-IS capable network router.

Question: What command will list only current connections, including IP addresses and port numbers?

Answer: netstate -n

Question: Which statement does NOT accurately describe characteristics of the OSPF protocol?

Answer: OSPF requires very little CPU or memory resources.

Question: What is the Internet standard MTU?

Answer: 1,500 bytes

Question: What statement regarding the differences between the Windows tracert utility and the Linux/UNIX/macOS traceroute utility is accurate?

Answer: By default, the tracert utility uses ICMP echo requests, while traceroute uses UDP datagrams or TCP SYN messages.

Question: UDP provides error checking, but not sequencing.

Answer: FALSE

Question: Broadband cable Internet service and cable TV are most commonly delivered over long distances via what type of cable?

Answer: RG-6

Question: Which kind of crosstalk occurs between wire pairs near the source of the signal?

Answer: NEXT

Question: Which of these categories of twisted-pair cable can support Gigabit Ethernet?

Answer: Cat 5e, Cat 6a, Cat 7

Question: What statement correctly describes "jitter"?

Answer: Jitter is what happens when packets experience varying amounts of delay and arrive out of order.

Question: The ST and SC fiber connectors are the most commonly found connectors due to their smaller sizes.

Answer: FALSE

Question: In IEEE terminology, a group of stations that share an access point are said to be part of which of the following?

Answer: basic service set

Question: When using RFID, what is an ARPT (Active Reader Passive Tag)?

Answer: It is a tag that is activated by an active reader, and uses power from the reader's radio to power its transmission.

Question: What statement regarding the Power Over Ethernet standards is inaccurate?

Answer: Power over Ethernet requires CAT6 or better copper cable.

Question: Which routing protocol started as a Cisco proprietary protocol and combines some of the features of a link-state protocol with that of distance-vector protocols?

Answer: EIGRP

Question: If the VLAN tag is present in an Ethernet frame, what is the maximum frame size?

Answer: 1522 Bytes

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

Answer: Physical Layer

Question: 802.11ac Wave 2 devices can theoretically support how much maximum throughput?

Answer: 3.47 Gbps

Question: The LLC sublayer is primarily concerned with managing MAC addresses in message frames.

Answer: FALSE

Question: In the event of a duplicate MAC address shared by two hosts on a switched network, what statement is accurate?

Answer: The hosts will still send and receive traffic, but traffic may not always reach the correct destination.

Question: Which statement regarding the Border Gateway Protocol (BGP) is accurate?

Answer: BGP utilizes TCP for communicating updates.

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

Answer: The sequence control field indicates how packets will be subdivided.

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

Answer: Mgmt Frames

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

Answer: FALSE