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Network+ 10-008 > Network Fundamentals > Flashcards

Network Fundamentals Flashcards

Fundamentals from ITPRO

1
Q

Name The command line Commands to see the ip address configurations

A

Ipconfig
ifconfig - linux
ip address - latest linux

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2
Q

trongest encryption level possible using PSK without utilizing an additional authentication server. What encryption type should be implemented?

A

Since he wishes to use a pre-shared key and not require an authentication server, WPA personal is the most secure choice. If WPA2 Personal were an option, it would be more secure, though. WPA2 Enterprise is incorrect since the requirement was for a PSK, whereas WPA2 Enterprise requires a RADIUS authentication server to be used with individual usernames and passwords for each client. MAC filtering does not use a password or preshared key. WEP uses a pre-shared key to secure a wireless network, but WPA uses a stronger encryption standard than WEP.

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3
Q

You are working as a network administrator and are worried about the possibility of an insider threat. You want to enable a security feature that would remember the Layer 2 address first connected to a particular switch port to prevent someone from unplugging a workstation from the switch port and connecting their laptop to that same switch port. Which of the following security features would BEST accomplish this goal?

A

Port security, also known as persistent MAC learning or Sticky MAC, is a security feature that enables an interface to retain dynamically learned MAC addresses when the switch is restarted or if the interface goes down and is brought back online. This is a security feature that can be used to prevent someone from unplugging their office computer and connecting their laptop to the network jack without permission since the switch port connected to that network jack would only allow the computer with the original MAC address to gain connectivity.

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4
Q

Applications layer

A

Upper Layer
Provides application network access
dhcp, dns, ftp, smtp, pop3

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5
Q

presentation layer

A

Upper Layer
Formats application
ssl, ssh, compression, encryption, decryption, encoding

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6
Q

session layer

A

upper layer
establishes, maintains and terminates session communication
netbios, rpc, smb, sockets

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7
Q

Transport layer

A

lower layer
tcp/udp
sequencing and segmentation unless UDP

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8
Q

Network Layer

A

lower layer
Routing, Logical Addressing
IP,ICMP,NAT,OSPF

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9
Q

Data Link Layer

A

lower layer
flow control, acknowledgements,
detection
determine access to the media

sub layers:
Logical Link control(LLC)
Media Access Control(MAC)

Ethernet, ATM, MPLS, PPP, STP

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10
Q

Physical

A

Lower Layer
Electrical and Mechanical
Copper, Fiber, IEEE, 1394, BASE standards

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11
Q

how many headers on a Frame

A

layer 6 through layer 2 and then its handed off to be sent across physical media

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12
Q

data unit on network/data link

A

packet on the network
frame on the data

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13
Q

data on layer 7

A

payload - the data as it begins the encapsulation process as it moves down the osi stack

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14
Q

what is being added to the data on layer 4

A

the tcp/udp headers are added

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15
Q

what is being added to the data on layer 3

A

ip header

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16
Q

what is being added to the data on layer 2

A

Ethernet Header

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17
Q

What is an MTU?

A

The size of the frame

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18
Q

Network Topologies

A

the way links and nodes are arranged
the layout of the components that make up a network

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19
Q

Topology:
backbone cable
nodes are linking in
terminators on both ends
Vampire taps
broadcasts to all machines

A

Bus

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20
Q

Topology
connected in a circle or token
deterministic
Talking Stick
one computer goes down and they all go down

A

Ring

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21
Q

Topology
all devices are connected to the central device
if a node goes down it doesnt drop the signal
there is a single point of failure

A

Star

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22
Q

Can WAN’s connect other LAN’s together?

A

YES

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23
Q

MPLS Network

A

Multiple networks connected through the ISP’s network

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24
Q

Storage that is needed to be accessed at high speeds across the network when people need Data fast and quick

A

Storage Area Network(SAN)

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25
Q

Creating a logical representation of a component through software or
recreating a pc part in a virtual environment

A

Virtualization
- virtual machines
-virtual network devices
-virtual network devices such as firewall, switches, or routers

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26
Q

UTP

A

Unshielded Twisted Pair

27
Q

how many pairs and wire conductors?

A

4 Twisted pairs
8 wires or conductors

28
Q

cat3
cat4
cat5 fast ethernet

A

10mbps 100 meters 328ft
16mbps 100 meters 328ft
100mbps meters 328ft

29
Q

what are cat3’s still used for

A

telephone cables

30
Q

Cat5e Gigabit Ethernet

A

1GBPS 100meters/328ft

31
Q

CAT6 Gigabit Ethernet
Cat6A gigabit

A

1gbps 100 meters(55 meters for 10gbps)
1gbps 10gbps 100 meters

32
Q

BNC connector

A

twist to lock connectors

connecting T connectors

33
Q

Greatest distance of bounded media
Core Diameter = 9 Microns
cladding 125 microns

A

Single Mode of bounded media

34
Q

shorter distance than single mode
core = 50 or 62.5
cladding 125 macron

A

MMF(multimode Fiber)

35
Q
A

SC connection

36
Q
A

LC connector or little connector

37
Q
A

Straight tip

38
Q
A

MTRJ connector

39
Q

measure of the transfer of bits across the media over a given period of time

A

Throughput

40
Q

the capacity of a medium to carry data

A

Bandwidth

41
Q

replaced the old GBIC’s
also in quad form as well

A

SFP or small form factor plug
theres a plus variant as well

42
Q

CWDM

A

Course Wavelength Division multiplexing
supports 18 wavelengths per fiber
shorter distances
cheaper

43
Q

DWDM

A

Dense Wavelength Division Multiplexing

supports up to 96 wavelengths per fiber

supports greater channel density at greater distance

wavelengths are 0.8nm apart

44
Q

IEEE 802.3

A

Ethernet standard
defines CSMA/CD
many revisions over the year
cabling follows BASE standards

45
Q

copper

A
46
Q

CSMA/CD

A

Listens to see if data is being transmitted before sending data

47
Q

fiber

A
48
Q

Patch Panel

A

Connects a wall jack to a patch panel then to a switch or ISP

49
Q

Remote Connections

A

SSH 22
Telnet 23
RDP 3389

50
Q

Email

A

SMTP 25
POPv3 110
IMAP 143
SMTPS 587 (TLS)
IMAPS 993 (SSL)
POP3S 995 (SSL)

51
Q

Websites

A

HTTP 80
HTTPS 443

52
Q

SQL related

A

SQL Server 1433
SQLNet 1521
MySQL 3306

53
Q

Network Services

A

DHCP 67/68
DNS 53
NTP 123
SNMP 161/162
LDAP 389
LDAPS 636
Syslog 514
SIP 5060/50611

54
Q

IP protocol types

A

Internet Control Message Protocol (ICMP)
TCP
UDP
Generic Routing Encapsulation (GRE)
Internet Protocol Security (IPSec)
AH
ESP

55
Q

what service is used to set ip addresses

A

dhcp 67/68

56
Q

dora

A

discover
offer
request
ack
the process to get the ip address from the server

57
Q

ip helper address

A

dhcp relay

58
Q

channel 1,6, 11

A

2.4ghz range

59
Q

OSI layer responsible for translating and formatting information

A

presentation

60
Q

adding a header and a footer to data

A

Data Encapsulation

61
Q

Data Encapsulation occurs at which layer

A

data link

62
Q

what is the purpose of TCP/IP

A

to control the flow of internet. Transmission Control Protocol is responsible for handling and controlling data flow

63
Q

file transfer related ports

A

ftp 20/21
sftp 22
tftp 69

Network+ 10-008 (7 decks)

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