CompTIA N10-006 - CompTIA Network+ Certification Exam

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Total 461 questions

An administrator has a virtualization environment that includes a vSAN and iSCSI switching. Which of the following actions could the administrator take to improve the performance of data transfers over iSCSI switches?

  • A. The administrator should configure the switch ports to auto-negotiate the proper Ethernet settings.
  • B. The administrator should configure each vSAN participant to have its own VLAN.
  • C. The administrator should connect the iSCSI switches to each other over inter-switch links (ISL).
  • D. The administrator should set the MTU to 9000 on the each of the participants in the vSAN.


Answer : D

Explanation:
When using an iSCSI SAN (with iSCSI switching), we can improve network performance by enabling jumbo frames. A jumbo frame is a frame with an MTU of more than 1500. By setting the MTU to 9000, there will be fewer but larger frames going over the network.
Enabling jumbo frames can improve network performance by making data transmissions more efficient. The CPUs on switches and routers can only processone frame at a time. By putting a larger payload into each frame, the CPUs have fewer frames to process.

Which of the following is an example of an IPv4 address?

  • A. 192:168:1:55
  • B. 192.168.1.254
  • C. 00:AB:FA:B1:07:34
  • D. ::1


Answer : B

Explanation:
AnIPv4 address is notated as four decimal numbers each between 0 and 255 separated by dots (xxx.xxx.xxx.xxx). Each number is known as an octet as it represents eight binary bits.
All four octets make up a 32-bit binary IPv4 address.
In this question, 192.168.1.254 is a valid IPv4 address.

When configuring a new server, a technician requests that an MX record be created in
DNS for the new server, but the record was not entered properly. Which of the following was MOST likely installed that required an MX record to function properly?

  • A. Load balancer
  • B. FTP server
  • C. Firewall DMZ
  • D. Mail server


Answer : D

Explanation:
A mail exchanger record (MX record) is a DNS record used by email servers to determine the name of the email server responsiblefor accepting email for the recipients domain.
For example a user sends an email to [email protected]. The sending users email server will query the somedomain.com DNS zone for an MX record for the domain.
The MX record will specify the hostnameof the email server responsible for accepting email for the somedomain.com domain, for example, mailserver.somedomain.com. The sending email server will then perform a second DNS query to resolve mailserver.somedomain.com to an IP address. The sending mailserver will then forward the email to the destination mail server.

A technician has been given a list of requirements for a LAN in an older building using
CAT6 cabling. Which of the following environmental conditions should be considered when deciding whether or not to use plenum-rated cables?

  • A. Workstation models
  • B. Window placement
  • C. Floor composition
  • D. Ceiling airflow condition


Answer : D

Explanation:
In a large building, the plenum is the space between floors used to circulate air through the building. This space is also an ideal place to run computer network cabling. However, in the event of fire in the building, the network cables can be very hazardous because when they burn, the cable insulation gives off a poisonous smoke that gets circulated around the building. Furthermore, the burning cables help to spread the fire.
Plenum-rated cables are designed to be cabled through the plenum in a building. Plenum- rated cables are covered in fire-retardant plastic jacket to avoid the risk of toxic smoke being circulated around the building.

QUESTIONNO: 40 -
A VLAN with a gateway offers no security without the addition of:
A. An ACL.
B. 802.1w.
C. A RADIUS server.
D. 802.1d.

Answer: A -
A gateway in a VLAN connects to another network. The other network can be the Internet, another subnet on the network or another VLAN. The gateway will be a router and for security, it should also be a firewall.
A firewall is a system designed to prevent unauthorized access to or from a private network. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. Firewalls use
ACLs (access control lists) to determine which traffic is allowed through the firewall. All traffic entering or leaving the intranet passes through the firewall, which examines each message and blocks or allows the message depending on rules specified in the ACL. The rules in the ACL specify which combinations of source IP address, destination address in
IP port numbers are allowed.

Which of the following describes an IPv6 address of ::1?

  • A. Broadcast
  • B. Loopback
  • C. Classless
  • D. Multicast


Answer : B

Explanation:
The loopback address is a special IP address thatis designated for the software loopback interface of a computer. The loopback interface has no hardware associated with it, and it is not physically connected to a network. The loopback address causes any messages sent to it to be returned to the sendingsystem. The loopback address allows client software to communicate with server software on the same computer. Users specify the loopback address which will point back to the computer's TCP/IP network configuration.
In IPv4, the loopback address is 127.0.0.1.
In IPv6, the loopback address is 0:0:0:0:0:0:0:1, which can be shortened to ::1

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Total 461 questions