Troubleshoot Networks

Question 1

an electrical connector that joins insulated wires without stripping the insulation.

Answer 1

insulation displacement connector (IDC)

Question 2

Answer 2

RJ45 terminated patch cord between the patch panel port and a switch port.

Question 3

What is Intermittent connectivity?

Answer 3

a network connection that repeatedly drops or experiences temporary disruptions, causing inconsistent access to the internet, where the connection comes and goes at random intervals, rather than being completely lost or consistently slow

Question 4

a situation where a network switch port repeatedly and rapidly loses and regains connectivity, essentially going up and down frequently, causing unstable network connections between devices due to the constant link status changes

Answer 4

Port Flapping

Question 5

A duplex mismatch of switch and network adpator can be fixed by either?

Answer 5

enabling autonegotiation (if available and working) on both ends or by forcing the same settings on both ends

Question 6

External interference” in network cabling refers to

Answer 6

unwanted electrical signals from sources outside the cable itself that disrupt the data signal traveling through the wire,

Question 7

A “problem in network adapter driver” means

Answer 7

that the software responsible for communicating with your computer’s network card (like Ethernet or Wi-Fi) is malfunctioning, potentially causing issues like slow internet speeds, inability to connect to networks, or frequent connection drops; this often stems from outdated drivers, incorrect settings, or driver corruption.

Question 8

Troubleshooting Wireless Configuration Issues

Answer 8

checking your device’s network settings, ensuring the correct SSID and password are entered, then move on to verifying the router’s status, signal strength, potential interference, and physical connections; if necessary, restart the router, update firmware, and consider adjusting the wireless channel to minimize interference; also check for any issues with your internet service provider (ISP) connection.

Question 9

received signal strength indicator (RSSI)

Troubleshoot Wireless Issues

Answer 9

is a measurement of how well your device can hear a signal from an access point or router. It’s a value that is useful for determining if you have enough signal to get a good wireless connection.

Question 10

Wi-Fi analyzer software

troubleshoot wireless signal issues

Answer 10

is designed to identify the signal strength of nearby
networks on each channel. It shows the signal strength, measured in dBm, and expressed as a negative value, where values close to zero represent a stronger signal

Question 11

Voice over Internet Protocol (VoIP)

Answer 11

is a technology that allows users to make phone calls using an internet connection instead of a traditional phone line. VoIP can also be used for video calls, voicemail, and more.

Question 12

is the time it takes for a signal to reach the recipient, measured in milliseconds (ms).

Answer 12

Latency

Question 13

is typically caused by network congestion affecting packet processing on routers and switches.

VOIP issues

Answer 13

Jitter

Question 14

means that switches, access points, and routers are all configured to identify VoIP data and prioritize it over bursty data.

VOip issues

Answer 14

quality of service (QoS)

Question 15

limited connectivity

Answer 15

message specifically means that the host can
establish a physical connection to the network but has not received a lease for an IP configuration from a DHCP server.

Question 16

Troubleshoot Limited Connectivity

Answer 16

1. Establish the scope of the issue—How many clients affected.
2. • Check the configuration of patch cords or default gateway, DHCP, and DNS.
3. Check the VLAN configuration, switch port is not configured with the correct VLAN ID.