Networking Fundamentals

Question 1

FTP port

Answer 1

20 (incoming)

21 (outgoing)

Question 2

SFTP/SSH port

Answer 2

22

Question 3

Telnet port

Answer 3

23

Question 4

SMTP port

Answer 4

25

Question 5

DNS port

Answer 5

53

Question 6

POP3 port

Answer 6

110

Question 7

NTTP port

Answer 7

119

Question 8

Samba port

Answer 8

139

Question 9

IMAP port

Answer 9

143

Question 10

SNMP port

Answer 10

161

Question 11

HTTPS port

Answer 11

443

Question 12

SMTP over SSL port

Answer 12

465

Question 13

IMAP over SSL port

Answer 13

993

Question 14

POP3 over SSL port

Answer 14

995

Question 15

/etc/services

Answer 15

A file providing a mapping between textual names for internet services ad the underlying assigned port numbers and protocol types

Question 16

tcpdchk

Answer 16

command used to check the syntax of /etc/inetd.conf

Question 17

ifdown eth0

Answer 17

Used to deactivate a network interface

Question 18

ifconfig eth0 10.0.0.0 netmask 255.255.255.0

Answer 18

Set eth0 IP address to 10.0.0.0 with class c netmask

Question 19

route add default gw 192.168.1.1

Answer 19

Create a defualt route using a gateway of 192.168.1.1

Question 20

dig hostname mx

dig mx hostname

Answer 20

Returns the mx record for the specified hostname

Question 21

Configuration file that tells Linux how to handle DNS and hosts

Answer 21

/etc/nsswitch.conf