5.2

Question 1

Whats OTDR?

Answer 1

Optical Time Domain Reflectometer is a tool used to:

1. estimate cable lengths
2. identify splice locations
3. Cable impedance information
4. signal losses
5. certify cable installations
6. locate copper or fiber breaks

Question 2

Whats Punch-down tool?

Answer 2

It’s the tool to punch a wire into wiring block.

Question 3

Whats light meter used for?

Answer 3

It tells us how much light is getting through.

Question 4

Whats a tone generator?

Answer 4

It tells us where a wire goes and wire tracing becomes easy(Coax, modular jack and punch down connectors.

Question 5

Whats a loopback adapter?

Answer 5

It’s usefull for testing physical ports. It is used for Serial connection / RS-232(9pin or 25 pin) and network connections(Ethernet, T1, Fiber)

Question 6

Whats a multimeter used for?

Answer 6

It helps with the AC or DC voltage and also continuity

Question 7

Whats a spectrum analyzer?

Answer 7

It allows you to examine all of the different frequencies that happen to be in a particular range all at once, and you’ll be able to tell exactly where most of the signal is in that particular frequency range. It also views everything communicating in the wireless frequency spectrum.

Question 8

What is ping command used for?

Answer 8

To test reachability:

1. Determine round-trip time
2. It uses ICMP

Question 9

Whats traceroute/tracert commands used for?

Answer 9

It determines the route a packet takes to a destination. It takes advantage of ICMP Time to Live(TTL) Exceeded error message.

Question 10

What are nslookup and dig commands used for?

Answer 10

It helps to lookup information from DNS servers(IP addresses, cache timers, etc) dig stands for Domain Information Groper.

Question 11

What are ipconfig and ifconfig commands used for?

Answer 11

It helps to determine TCP/IP and network adapter information. ipconfig is used for Windows and if config is used for Linux.

Question 12

What are iptables command used for?

Answer 12

iptables is used for Linux as firewall.

Question 13

What is netstat command used for?

Answer 13

(Network statistics) it provides you with many different views of what the statistics are for network communications on that particular device.

Question 14

What is tcpdump command used for?

Answer 14

It captures packets from command line, apply filters and view in real-time. It is available in most Unix/Linux OS.

Question 15

What is pathping command used for?

Answer 15

It combines ping and traceroute. 1st it runs a traceroute to build a map then it measures roundtrip time and packet loss at each hop.

Question 16

What is Nmap command used for?

Answer 16

(Network mapper)

1. It is best known as port scanner which means it finds devices and identifies open ports.
2. It also does OS scan which helps to discover the OS without logging in to a device.
3. It can be used as service scanner which shows what service is available on a device(name, version, details)

Question 17

What is route command used for?

Answer 17

It views the device’s routing table but for windows we use “route print”.

Question 18

What is arp command used for?

Answer 18

(Address Resolution Protocol) It determines a MAC address based on an IP address

Question 19

What are protocol analyzers used for?

Answer 19

It solves complex application issues by gathering frames on the network. It views traffic patterns.

Question 20

What are Network/port scanners used for?

Answer 20

It scans for IP addresses and open ports. We can pick a range of IP addresses and sometime we can visually map a network using the scanner and also detect rogue system. (Ex: Nmap/Zenmap)

Question 21

What are used wireless packet analyzers for?

Answer 21

They are used to monitor wireless networks.

Question 22

What are bandwidth speed testers used for?

Answer 22

They are used for bandwidth testing.(Ex: speedOf.Me, speedtest.net)

Question 23

What are packet sniffers used for?

Answer 23

They are used for gathering, collecting, and logging some or all packets that pass through a computer network.