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