Other Network+ Things to Know

Question 1

What types of interface issues?

Answer 1

• CRC Errors
• Runts
• Giants
• Drops

Question 1

What is PDU?

Answer 1

• Power Distribution Unit
• A specialized device that distributes electric power to network components and computing equipment
• Power management

Question 2

What is a CRC?

Answer 2

• Cylinder Redundancy Check Error
• The data block’s integrity check does not match the value during transmission
• Occur by electrical interference, faulty hardware or transmission issues

Question 3

What is Runts?

Answer 3

Frames smaller than the minimum frame size

Question 4

What is Giants?

Answer 4

Frames that exceed the maximum frame size of the network

Question 5

What is Drops?

Answer 5

Occur when a device’s buffer is full and can’t accommodate incoming frames or packets anymore

Question 6

What is client disassociation issues in Wireless Network?

Answer 6

• Impacts Wireless Network
• Idle, Session, or Authentication Timeout
• Wireless Network Change
• Manual Deletion
• Access Point Radio Reset

Question 7

What is link aggregation?

Answer 7

• Known as trunking, Ethernet bonding, NIC teaming
• Combines multiple physical links into single logical combination

Question 8

What half-duplex?

Answer 8

Can either send OR receive data

Question 9

What is full-duplex?

Answer 9

Can send and receive data simultaneously

Question 10

DataCenter Topology
What is North-South Traffic?

Answer 10

Traffic that enters datacenter from outside (Southbound traffic)
Traffic that leaves data center (North traffic)

Question 11

DataCenter Topology
What is East-West Traffic?

Answer 11

● Data flow within a datacenter
● Example: In a spine and leaf architecture, all data flow between
servers is considered east-west traffic

Question 12

What is Routing Table?

Answer 12

■ Helps determine which route entry is the best fit for the network
■ Routing decisions are based on Layer 3 information and map to Layer 2

Question 13

What is ARP Cache?

Answer 13

• Used by routers to map IP addresses to MAC addresses within a local area network

Question 14

What is prefix length in subnet?

Answer 14

The prefix length is the number of 1 bits in the subnet mask, determines the size of the subnet.

Note: For example, a prefix length of 255.255.255.0 indicates that the network portion of the IPv4 address is the leftmost 24 bits, which can also be written as /24 in CIDR notation.

Question 15

What is Traffic Shaping?

Answer 15

• Known as Packet Shaping
• A congestion management method that regulates network data transfer by delaying the flow of less important or less desired packets.

Question 16

What is Port-side Exhaust Airflow? (Standard air)

Answer 16

Air is drawn into the switch through the power supply side and expelled through the port side.

Question 17

What is Port-side Intake Airflow?
(Reverse air)

Answer 17

Air is drawn into the switch through the port side (the side with the ethernet or fiber ports) and expelled through the power supply side.

Question 18

What is Packet Capture Sensor?

Answer 18

• Known as network sniffers
• Designed to intercept and analyze network packets.

Question 19

What is MDF?

Answer 19

• Main Distribution Frame
• Primary, central point where incoming and outgoing cables are terminated.

Question 20

What is IDF?

Answer 20

• Intermediate Distribution Frame
• Local distribution point within a building or campus.

Question 21

Which DHCP feature should they use to allocate different ranges of IP addresses to each department?

Answer 21

DHCP Scope

Question 22

What is a Network Heat-Map?

Answer 22

• Known as WIFI Heat Map
• A graphical representation indicating areas of high and low network activity or performance

Question 23

What is a PKI?

Answer 23

• Public Key Infrastructure
• Commonly used to manage digital certificates, ensuring secure communication and authentication over a network

Question 24

What is EUI?

Answer 24

• Extended Unique Identifer
• EUI-64 is a method we can use to automatically configure IPv6 host addresses.

Question 25

What is UPS?

Answer 25

• Uninterruptible Power Supply
• An electrical apparatus that provides emergency power during main power failures.
• Typically last 15 to 30 minutes

Question 26

What is NTS?

Answer 26

• Network Time Security
• a time synchronization protocol designed to address security vulnerabilities inherent in traditional time synchronization protocols such as NTP and SNTP.
• Provides strong authentication, integrity protection, and confidentiality for time synchronization messages.

Question 27

What is TableTop Exercise in pentration testing?

Answer 27

A cybersecurity simulation that tests an organization’s ability to respond to a cyber attack.

Question 28

What is “subinterfaces” in networking?

Answer 28

It allows a single physical interface to be divided into multiple logical interfaces, improving network management and security

Question 29

What is DHCP Snooping?

Answer 29

A security feature that monitors and controls DHCP traffic to prevent malicious DHCP servers from interfering with a network.

Question 30

What is wet-pipe system in a fire suppression system?

Answer 30

The most basic type of fire suppression system, and it involved using a sprinkler system and pipes that always contain water in the pipes

Question 31

What is pre-action system in a fire suppression system?

Answer 31

A pre-action system minimizes the risk of accidental release from a wet pipe system. With a pre-action system, both a detector actuation like a smoke detector and a sprinkler must be tripped prior to water being released.

Question 32

What is special suppression system in a fire suppression system?

Answer 32

Special suppression systems, like a clean agent system, use either a halocarbon agent or inert gas. When releases, the agents will displace the oxygen in the room with the inert gas and suffocates the fire.

Question 33

What is a WAF?

Answer 33

• Web Application Firewall
• An application-aware firewall can make decisions about what applications are allowed or blocked by a firewall, and TLS connections are created and maintained by applications.