Block 9

Question 1

DNS + purpose

Answer 1

Domain name server-connects domain names with any ip address

Question 2

MAC address + purpose

Answer 2

Media access control- internal address for nic’s.

Question 3

NIC

Answer 3

Network interface controller. Hardware that connects a device to a network

Question 4

ipconfig

Answer 4

Shows all your network configurations

Question 5

Ens5

Answer 5

In ipconfig. Where network info for own computer resides.

Question 6

ens5 inet

Answer 6

Your ip address

Question 7

ens5 netmask

Answer 7

How many hosts are available on your network

Question 8

ens5 broadcast

Answer 8

Broadcast ip

Question 9

inet6

Answer 9

Hex address, newer system, 128 bits

Question 10

ens5 ether

Answer 10

Mac address

Question 11

ens5 ether

Answer 11

Mac address

Question 12

Ip address show

Answer 12

Show/manipulate networking interface attributes

Question 13

Ping example

Answer 13

Ping google.com or ping 8.8.8.8

Question 14

ipv4 acronym

Answer 14

Internet protocol version4

Question 15

ip addr

Answer 15

Same as ipconfig

Question 16

Network class A addresses and # of hosts

Answer 16

10.0.0.0 to 10.255.255.255. Private addresses. Millions of hosts

Question 17

Network class b it’s and #of hosts

Answer 17

172.16 to 172.31.255.255. Private. Thousands of hosts

Question 18

Network class c it’s and # of hosts

Answer 18

192.168 to 192.168.255.255. Private. Less than 254 hosts

Question 19

etc/host

Answer 19

Stores local dns addresses

Question 20

Curl

Answer 20

An open source command line interface to exchange info on a server

Question 21

Lo and lo -c

Answer 21

Loopback interface. lo -c ipaddress. Check to see if we can connect to ourselves ownnserver and trouble shoot it.

Question 22

Ping
How many times and how many packets

Answer 22

Ping -c # of packets.

Question 23

Ip address -c show ens5

Answer 23

Short way to see only ens5 data. -c shows colors

Question 24

CIDR acronym and purpose

Answer 24

Classless inter-domain routing. Tells you how many 1s are in the subnet mask.
Ex.. 192.168.1.O/24 = 24 ones followed by 8 zeros

Question 25

127.x.x.x is for what

Answer 25

Local hosts

Question 26

Top level domain

Answer 26

.com, .net, etc

Question 27

2nd level domain

Answer 27

Website name

Question 28

Subdomain

Answer 28

Anything preceeding website name. Ex...welcome.fullstackacademy.com

Question 29

Protocol

Answer 29

Hotpot, https etc

Question 30

nslookup

Answer 30

Queries dns servers to find out dns info

Question 31

Non- authoritative answer in nslookup

Answer 31

Server had to go to another dns to find the request

Question 32

Tcp

Answer 32

Transmission control protocol

Question 33

Udp

Answer 33

User datagram protocol

Question 34

Ports

Answer 34

Endpoint of network communication. Need a port to communicate. Like apartment doors in a building. Ip address is building. Port is door.

Question 35

Port 20/21

Answer 35

File transfer protocol. 20 = data transfer, 21 = message control

Question 36

Port 22

Answer 36

Ssh

Question 37

Port 25

Answer 37

Simple mail transfer protocol (smtp). Emails

Question 38

Port 53

Answer 38

Dns queries

Question 39

Port 80

Answer 39

Http

Question 40

Port 443

Answer 40

Https

Question 41

Port 3306

Answer 41

Database exchange

Question 42

nmap

Answer 42

Used to find open ports, identify devices, services and OS's. Sudo nmap -F 192.168.1.54

Question 43

zenmap

Answer 43

Like nmap but gui version

Question 44

netstat

Answer 44

Prints network stats, routing tables, interface stats.

Question 45

netstat -t

Answer 45

Tcp ports. Lists open connections.

Question 46

netstat -l

Answer 46

Open ports that are listening

Question 47

netstat -p

Answer 47

Show program responsible for port

Question 48

netstat -n

Answer 48

Show number of ports

Question 49

Zenmap target

Answer 49

Target ip. Can use - to look @ multiple addresses. Ex...target 192.168.2.1 -25

Question 50

Network enumeration

Answer 50

Seeing what's going on in the whole network.

Question 51

What is subcommand nmap -F

Answer 51

Fast scan. Only scans 100 most common tcp ports