LP - Network Security Concepts

Question 1

FTP port number

Answer 1

20, 21

Question 2

SMTP port number

Answer 2

25

Question 3

SSH port number

Answer 3

22

Question 4

LDAP port number

Answer 4

389

Question 5

LDAPS port number

Answer 5

636

Question 6

SMB port number

Answer 6

445

Question 7

SNMP port number

Answer 7

161, 162

Question 8

IP address apply to which OSI layer

Answer 8

3

Question 9

In IPv6 the link local address represented at the start on the address as

Answer 9

fe80

Question 10

IPv4 DNS query is an A record over which protocol and port

Answer 10

UDP 53

Question 11

An A record is

Answer 11

IPv4

Question 12

AAAA record is

Answer 12

IPv6

Question 13

PTR does what?

Answer 13

Resolves IP address to FQDN - reverse look up

Question 14

NS is what?

Answer 14

Name Server which specifies authoritative server over a zone

Question 15

SOA is what?

Answer 15

Start of Authority; metadata about the DNS zone such as last update timestamp

Question 16

abuseIPDB is a

Answer 16

searchable Internet blacklist of malicious IPs

Question 17

WPA3 uses what instead of PSK

Answer 17

SAE

Question 18

VPN Protocol - PPTP is

Answer 18

older and not considered secure

Question 19

VPN Protocol - L2TP (Layer 2 Protocol) normally uses

Answer 19

IP Security (IPSec)

Question 20

VPN Protocol SSL/TLS is considered

Answer 20

firewall friendly since they use TCP port 443

Question 21

Client-to-site VPN client are assigned an

Answer 21

IP address

Question 22

Client-to-site VPN can use the following protocols

Answer 22

IPSec, Secure Socket Tunneling Protocol (SSTP), OpenVPN SSL/TLS

Question 23

Is IPSec application specific?

Answer 23

No

Question 24

IPSec modes Tunnel

Answer 24

encapsulates packets by adding a header which gets removed at the other end

Question 25

IPSec mode Transport

Answer 25

No header addes it just encrypts the payload

Question 26

IPSec - Authentication Header (AH) does not

Answer 26

encrypt the payload

Question 27

IPSec - ESP can it be used with or without AH?

Answer 27

either

Question 28

IPSec - ESP encrypes the

Answer 28

packet payloads

Question 29

Linux time command to return the current date and time is

Answer 29

timedatectl

Question 30

Linux to check the time status is

Answer 30

systemctl status system-timesyncd

Question 31

Linux command to add a new netwrok route is

Answer 31

ip route add

Question 32

Linux command using the 'chrony' package to show connected time consumers

Answer 32

chronyc clients