CompTIA Network+ (N10-007) 6 Practice Exams and Simulations Flashcards
(This is a simulated Performance-Based Question. On the real certification exam, you will be asked to drag-and-drop the correct antennas onto the APs.)
Your company has just purchased a new building down the street for its executive suites. You have been asked to select the proper antennas to establish a wireless connection between the two buildings.
Which of the following is the BEST antenna configuration to use for AP4 and AP5 to control the signal propagation and minimize the chances of the signal being intercepted?
OBJ-2.2: Parabolic antennas work well for outside wireless applications where you want directional control of the signal (such as when connecting two buildings) and over a longer distance (such as “down the street” as in this scenario). The other possible option was the Directional antennas, but the signal strength of 5 dB would not be sufficient for an outdoor wireless connection over the distance presented in this scenario.
The company’s corporate headquarters provided your branch office a portion of their Class C subnet to use at a new office location. In the next several questions, you will be asked to allocate the minimum number of addresses using CIDR notation to accommodate each department’s needs.
192.168.10.0/24
55 sales/32fin/13it/25hr/11marketing
What is the correct CIDR notation for the Sales department’s subnet, which requires 55 devices?
OBJ 1.4: Since the Sales department needs 55 devices plus a network ID and broadcast IP, it will require 57 IP addresses. The smallest subnet that can fit 57 IPs is a /26 (64 IPs).
A home user performs a speed test using SpeedTest.net and receives the following report:
Which of the following is a correct interpretation of these results?
ping 13 ms/download 99.79mbps/upload116.61mbps
The user’s PC is receiving data at 99.79 Mbps and sending data to the server at 116.61 Mbps. When you run a speed test, your computer downloads a sample file from the test server, then uploads it back to the server to determine your connection speed.
You are a network administrator troubleshooting an issue with a newly-installed web server. The web server is available to internal network users, but users outside the internal network (Internet users) cannot reach the server. You run an IPCONFIG and receive the configuration below:
IP:192.168.0.10
netmask:255.255.254.0
gateway192.168.0.2
DNS: 10.10.0.255.
Which of the following is the MOST LIKELY reason why the server is unreachable from the Internet?
The most likely cause is that the NAT has not been properly configured on the border firewall. This would cause the internal network users to access the web servers still (since internal traffic doesn’t have to transit the firewall) but would still prevent Internet users from accessing the web server.
Routing prefixes, which are assigned in blocks by IANA and distributed by the Regional Internet Registry (RIR), are known as what?
An ASN (or Autonomous System Number) is used to control routing with BGP routing protocols to route traffic across the network.
The UPS that provides backup power to your server is malfunctioning because its internal battery has died. To replace the battery, you must shut down the server, unplug it from the UPS, and unplug the UPS from its power source (the wall outlet). You perform these actions but think that there has to be a better way to increase the server’s availability in the future. Which of the following recommendations would BEST increase the server’s availability based on your experience with the UPS battery replacement?
The BEST recommendation would be to install a redundant power supply in the server. Adding a second UPS would not solve the problem if the server still only has one power supply available. Switching from a UPS to a generator will not solve this issue, either, because generators also require scheduled maintenance and downtimes. Finally, adding a surge protector won’t provide power when you need to power off a UPS for a battery replacement.
A network technician works with a junior technician when the network technician is called away for a more urgent issue. The junior technician orders an SC 80/125 fiber cable instead of an ST 80/125. Which of the following will MOST likely be an issue with the new cable?
While both SC and ST are fiber cables, they utilize different connectors. The cable ordered will not be compatible with the current equipment in use.
What is considered a classless routing protocol?
IS-IS is known as a classless protocol. Classless routing protocols are those protocols that include the subnet mask information when the routing tables or updates are exchanged. Other classless routing protocols include EIGRP, RIPv2 (or newer), and OSPF.
A network technician wants to allow HTTP traffic through a stateless firewall. The company uses the 192.168.0.0/24 network. Which of the following ACLs should the technician implement?
This will permit traffic from the internal network (192.168.0.0/24) from any port to access the external network (any IP) to port 80 (HTTP). Since this is a stateless firewall, you must include the SPORT (source port) ANY to allow the outbound connection through the firewall.
Which of the following protocols must be implemented for two switches to share VLAN information?
The VLAN Trunking Protocol (VTP) allows a VLAN created on one switch to be propagated to other switches in a group of switches (that is, a VTP domain).
Which media access control technology will listen to a cable to ensure there is no traffic being transmitted before sending its traffic but will implement a back-off timer if a collision does occur?
In networking technologies that use CSMA/CD as their access method, a device first listens to the network media to make sure there is no signal already present from another device before it tries to place its own signal on the media. If a carrier signal is detected on the media, which indicates that a device is currently transmitting a signal, no other device can initiate a transmission until the carrier stops. If no carrier is detected, any device can transmit a signal. If two devices listen to the wire and detect no carrier signal, they may decide to send signals simultaneously. If this happens, a collision occurs between the two signals generated. Next, both devices detect the collision and stop transmitting their signals immediately, sending out a jamming signal that informs all other devices on the network that a collision has occurred and should not transmit. Meanwhile, the two devices whose signals created the collision cease transmitting and wait for random intervals of time (usually a few milliseconds) before attempting to retransmit.
Which of the following network infrastructure implementations would be used to connect two remote sales machines back to the main campus for all of their data and voice network traffic?
A crossover cable has a maximum distance of 300 ft over Cat5e. A satellite connection works when there is a line of sight between the office and the satellite, but the signal isn’t always reliable or fast enough. MPLS is based on a short path rather than a long path. Single-mode fiber can carry different types of data signals over long distances without losing any integrity. Therefore it is the best choice. You can lease a pair of single-mode fibers from the local telecommunications provider (called dark fiber) since it will already be buried underground and ready for your use.
