Networking

Question 1

NAT

Answer 1

Network Address Translation
Increase the number of addresses.

Question 2

Private IP addresses

Answer 2

1. 10.0.0.0 - 10.255.255.255
2. 172.16.0.0 - 172.31.255.255
3. 192.168.0.0 - 192.168.255.255

Question 3

NAT overload or PAT
SOURCE or PORT
Address translation

Answer 3

Used when there are multiple decides that need public address.

Question 4

Unicast

Answer 4

One device talking to one device

Question 5

Broadcast

Answer 5

One device talked to multiple devices
Single packet sent and all devices can see it.

Question 6

Multicast IPv6 and IPv4
But IPv6 only uses this as it can not broadcast

Answer 6

Packets are only received by devices that want to receive it.

Question 7

Any cast
IPv4 and 6.

Answer 7

Single destination multiple end points

Question 8

Subnet classes

Answer 8

Class A
0xxx (1-127) default subnet 255.0.0.0
Class B
10xx (128-191). 255.255.0.0
Class C
110x (192-223). 255.255.255.0

Question 9

CIDR. = a / before the total number of network bits in a subnet

Answer 9

Classless Inner Domain Routing
CIDR block notation
Slash notation
Prefix notation

Question 10

VLSM

Answer 10

Variable length subnet masks

Question 11

Three tier architecture

Answer 11

Core = center
Wed servers, databases, applications

Distribution = midpoint between core and users
Comms between access points
Manage path to end users

Access = where users connect
End stations, printers

Question 12

SAN

Answer 12

Storage area network
block level address

Question 13

FC

Answer 13

Fiber channel
2, 4, 8, 16 gigabit per second rates
Common commands. SCSI, SAS, SATA

Question 14

FCoE

Answer 14

Fire channel over Ethernet
Not routable

Question 15

iSCSI

Answer 15

Internet small computer system interface
Makes remote disk operate like local disc
Manages by software

Question 16

CSMA/CD
Half duplex Ethernet only

Answer 16

CS = Carried sense
MA = Multiple access
CD = collision detect

Question 17

NDP

Answer 17

Neighbor Discovery Protocol
Multicast ICMPv6

Question 18

PoE and PoE+

Answer 18

802.3af - 2003
15.4 watts power
350 mA

IEEE 802.3at - 2009
25.5 watts
600 mA

Question 19

VLAN Trunking

Answer 19

802.1Q
Add VLAN header to frame when sent

Question 20

IBSS

Answer 20

Independent basic service set
Two device communication
Ad Hoc
Temp or long term

Question 21

SSID
Service set identifier

Answer 21

Wireless network name

Question 22

SAE
WPA3

Answer 22

Simultaneous authentication of Equals
Diffie Hellman

Question 23

Runts

Answer 23

Less than 64 bytes

Question 24

Giants

Answer 24

More than 1518 bytes

Question 25

CRC Error

Answer 25

Failed check frame sequence May be bad cable or interface

Question 26

Encapsulation Error

Answer 26

Inconsistent configs between switches

Question 27

AUP

Answer 27

Acceptable Use Policy

Question 28

Screened subnet

Answer 28

Previously known as Demilitarized zone

Question 29

LDAP

Answer 29

Lightweight directory access protocol. Used for reading and writing directories over an IP network

Question 30

EAP

Answer 30

Extensible authentication protocol

Question 31

IPv6 private address Apipa address Loopback address

Answer 31

Private Starts with an fc APIPA starts with an fe Loopback starts with :: or zeros

Question 32

MPLS

Answer 32

Multi protocol label switching

Question 33

MTU

Answer 33

Maximum transmission unit

Question 34

Spine and leaf advantages

Answer 34

Increased capacity Lower latency Higher scalability

Question 35

ATM

Answer 35

Asynchronous transfer mode @ 53 bytes.

Question 36

Valid APIPA addresses

Answer 36

169. 254.1.0. - 169.254.254.255

Question 37

Loopback address

Answer 37

127.0.0.1 - 127.255.255.254