CompTIA CompTIA Mobility+ N10-005 Questions & Answers

• Question 591:

  Which of the following is the difference between 802.11b and 802.11g?

  A. Distance

  B. Frequency

  C. Speed

  D. Transmission power

  Correct Answer: C

  802.11b has a maximum speed of 11Mbps whereas 802.11g has a speed of 54Mbps.

• Question 592:

  During a disaster recovery test, several billing representatives need to be temporarily setup to take payments from customers. It has been determined that this will need to occur over a wireless network, with security being enforced where possible.

  Which of the following configurations should be used in this scenario?

  A. WPA2, SSID enabled, and 802.11n.

  B. WEP, SSID enabled, and 802.11b.

  C. WEP, SSID disabled, and 802.11g.

  D. WPA2, SSID disabled, and 802.11a.

  Correct Answer: D

  WPA2 is a security technology commonly used on Wi-Fi wireless networks. WPA2 (Wireless Protected Access 2) replaced the original WPA technology on all certified Wi-Fi hardware since 2006 and is based on the IEEE 802.11i technology standard for data encryption.

• Question 593:

  A user reports that some normally accessible external sites are not responding, but most other sites are responding normally. Which of the following is MOST likely the cause?

  A. VLAN tag mismatch

  B. Wrong subnet mask

  C. Smurf attack

  D. Faulty routing rule

  Correct Answer: D

  This happens when the DNS server is able to resolve the URL but there can be a conflicting route pointing to somewhere else rather than to the correct device who is responsible for routing traffic to the internet.

• Question 594:

  A technician needs multiple networks, high speeds, and redundancy on a system.

  Which of the following configurations should be considered for these requirements? (Select TWO).

  A. Routing table

  B. Next hop

  C. Port mirroring

  D. Port monitoring

  E. VLANs

  Correct Answer: CE

  Port mirroring is used on a network switch to send a copy of network packets seen on one switch port (or an entire VLAN) to a network monitoring connection on another switch port. This is commonly used for network appliances that require monitoring of network traffic, such as an intrusion detection system, passive probe or real user monitoring (RUM) technology that is used to support application performance management (APM).

  In computer networking, a single layer-2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them via one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN or VLAN.

• Question 595:

  The network support team is constantly getting calls from users in a specific area of an office building. The users are able to connect to the office wireless network, but they sometimes disconnect or experience very slow download speeds. Which of the following is MOST likely the problem?

  A. Incorrect service set identifier

  B. Low signal strength or interference

  C. Incorrect encryption scheme

  D. Incorrect IP address or subnet mask

  Correct Answer: B

  This generally happens when the signals are weak in any particular area and any movement can make you lose connectivity to the internet. In this case you can try to increase the radio power so that the signal strength can be increased.

• Question 596:

  A network technician needs to configure a port on a switch to provide connectivity and electrical support to a WAP being installed in a warehouse.

  Which of the following features needs to be configured on the switch?

  A. STP

  B. PoE

  C. VTP trunking

  D. Port forwarding

  Correct Answer: B

  Power over Ethernet or PoE describes any of several standardized or ad-hoc systems which pass electrical power along with data on Ethernet cabling. This allows a single cable to provide both data connection and electrical power to devices such as wireless access points or IP cameras.

• Question 597:

  Which of the following wireless standards has a MAXIMUM transfer rate of 11Mbps?

  A. 802.11a

  B. 802.11b

  C. 802.11g

  D. 802.11n

  Correct Answer: B

  The 802.11b standard allows for a maximum data transfer speed of 11 Mbps, at a range of about 100 m indoors and up to 200 metres outdoors (or even beyond that, with directional antennas.) Range Range Hypothetical speed (indoors) (outdoors) 11 Mbits/s 50 m 200 m

  5.5 Mbits/s 75 m 300 m 2 Mbits/s 100 m 400 m 1 Mbit/s 150 m 500 m

• Question 598:

  A customer has requested a solution using multiple WAPs for wireless access.

  Which of the following should be different on each WAP to prevent wireless problems?

  A. Firewalls

  B. VLANs

  C. Channels

  D. Antenna types

  Correct Answer: C

  Protocol requires 16.25 to 22 MHz of channel separation (as shown above), adjacent channels overlap and will interfere with each other.

  Channels 1, 6, and 11 are the most common channels to choose, and most routers will use one of them as the default channel--but the general idea is to be as far away from everybody else as you can.

• Question 599:

  Which of the following performance optimization techniques would be MOST beneficial for a network-wide VoIP setup? (Select TWO).

  A. Proxy server

  B. Traffic shaping

  C. Caching engines

  D. Load balancing

  E. Quality of service

  Correct Answer: BE

  Traffic shaping retains excess packets in a queue and then schedules the excess for later transmission over increments of time. The result of traffic shaping is a smoothed packet output rate. QoS (Quality of Service) is a major issue in VOIP implementations. The issue is how to guarantee that packet traffic for a voice or other media connection will not be delayed or dropped due interference from other lower priority traffic.

  Things to consider are: Latency: Delay for packet delivery Jitter: Variations in delay of packet delivery Packet loss: Too much traffic in the network causes the network to drop packets Burstiness of Loss and Jitter: Loss and Discards (due to jitter) tend to occur in bursts

• Question 600:

  Joe has a small office and is looking to replace his phone system with a lower cost solution that requires minimal in-house support.

  Which of the following is the BEST choice?

  A. Wide Area Network

  B. NAT

  C. Virtual PBX

  D. Virtual LAN

  Correct Answer: C

  Virtual PBX, a business phone system providing call routing, follow-me calling, voice-mail, fax- mail, and ACD queues with no customer installed equipment.