Messer Notes 3

Question 1

EUI

Answer 1

Extended unique Identifier
64 bit
adding mac address as ipv6

Question 2

Dual-stack routing

Answer 2

router can use both IPv4 and IPv6 at the same time

Question 3

NS

Answer 3

neighbor Solicitation
Sent as a multicast
Who has this MAC address

Question 4

NA

Answer 4

neighbor advertisement
return from a NS
I match the MAC address of the NS

Question 5

SLAAC

Answer 5

stateless address Autoconfiguration

automatically configure an IP address without a DHCP server

Question 6

DAD

Answer 6

duplicate address detection

active on IPv6 to avoid duplicate address

Question 7

RA

Answer 7

router advertisement

response to show a device is a router in IPv6

Question 8

TCP 23

Answer 8

Telnet
login to device remotely
unsecure/in the clear communication

Question 9

TCP 22

Answer 9

SSH-Secure Shell

secure

Question 10

UDP 53

Answer 10

DNS Domain Name System
Converts names to IP addresses
large transfers use TCP 53

Question 11

TCP 25/587

Answer 11

SMTP simple mail transfer protocol
25 in the clear
587 secure using TLS encyipton

Question 12

TCP 110

Answer 12

POP3

basic mail transfer functionality

Question 13

TCP 143/993

Answer 13

IMAP4- Internet Message Access Protocol
includes management option deleting mail
993 TLS encryption

Question 14

tcp 22

Answer 14

SFTP Secure file transfer protocol
encrypted communication of files
more features

Question 15

tcp 20/21

Answer 15

FTP file transfer protocol
20 active mode
21 control

Question 16

udp 69

Answer 16

TFTP trivial File Transfer Protocol

simple file transfer

Question 17

udp 67/68

Answer 17

DHCP

requires DHCP server

Question 18

DHCP pool

Answer 18

available ip address for assignment in a ip network

Question 19

DHCP reservation

Answer 19

assign a address to a mac address

Question 20

tcp 80

Answer 20

http

Question 21

tcp 443

Answer 21

https

Question 22

udp 161

Answer 22

SNMP  simple network management protocol
different version
v1 in  the clear transfer 
v2 bulk in the clear
v3 a secure standard 
gather network statistics

Question 23

SNMP traps

Answer 23

alerts and notification when something happens

udp 162

Question 24

udp 514

Answer 24

Syslog
standard for message logging
usually a central log collector

Question 25

tcp 3389

Answer 25

RDP

Question 26

udp 123

Answer 26

NTP

Question 27

tcp 5060/5061

Answer 27

SIP VoIP signaling setup and manage Voip sessions

Question 28

tcp 445

Answer 28

SMB server message block | file sharing print sharing

Question 29

tcp 389

Answer 29

LDAP | store and retrieve information in a network directory

Question 30

tcp 636

Answer 30

a non-standard secure ldap

Question 31

tcp 1433

Answer 31

SQL | Microsoft Structure Query Language

Question 32

GRE

Answer 32

generic routing encapsulation encapsulate traffic inside of IP direct connection no built in encryption

Question 33

VPN Concentrator

Answer 33

encryption/decryption access device often integrated into a firewall software/hardware solution client software

Question 34

IPSec

Answer 34

internet Protocol Security | Security for OSI layer 3

Question 35

AH

Answer 35

Authentication Header | used in IPsec

Question 36

ESP

Answer 36

Encapsulation Security Payload | used in Ipsec

Question 37

255.255.255.255

Answer 37

network broadcast address

Question 38

DHCP relay/IP helper

Answer 38

router configuration that sees DHCP request and forwards the message to the DHCP server

Question 39

T1 timer

Answer 39

check in with DHCP server to renew the ip address

Question 40

T2 timer

Answer 40

if DHCP server is down try rebinding with any DHCP server

Question 41

FQDN

Answer 41

Fully Qualified Domain Name | DNS hierarchy

Question 42

Reverse DNS

Answer 42

provide ip address to get the FQDN website name

Question 43

RR

Answer 43

resource records | database of DNS

Question 44

SOA

Answer 44

start of authority | describes the DNS zone details

Question 45

A/AAAA

Answer 45

address record | DNS record that holds IPv4 addresses

Question 46

CNAME

Answer 46

A name is an alias of another, canonical name | one physical server multiple services

Question 47

SRV

Answer 47

Find a specific service | where is Voip

Question 48

MX

Answer 48

determines the host name for the mail server | this isn't a ip address but a name

Question 49

NS

Answer 49

name server list | list the name of server

Question 50

PTR

Answer 50

pointer record the reverse of the A or AAAA record reverse look up

Question 51

TXT

Answer 51

Text record SPF protocol- prevent spoofing, mail servers check that incoming mail really did come from an authorized host DKIM- Domain Keys Identified Mail, digitally sign your outgoing mail