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Section 1 Flashcards

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1
Q

Network protocol

A

Set of rules used to exchange information

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2
Q

Topology

A

architecture used to connect the network equipment

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3
Q

explain token ring vs a ring or star network

A

token ring passes a “token” back and forth from one network device to the next ensuring an opportunity for each device to communicate

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4
Q

what are disadvantages of a token ring network

A

token pattern changes or device failure or disconnection will stop the token from circulating

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5
Q

what topology is most common in today’s LANs

A

Star

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6
Q

what is one difference between a hub and a switch

A

hub broadcasts data to all devices on network

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7
Q

What is the OSI model

A

Developed by ISO in 1984, contains 7 layers as a guide for connecting different types of networks

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8
Q

what are the three basic steps in isolating a network problem

A
  • is the connection to the machine down?
  • is the network down?
  • is a service on a specific machine down?
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9
Q

which OSI layer uses binary transmission

A

physical

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10
Q

which OSI layer conains the MAC address

A

data

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11
Q

which OSI layer defines where routing occurs and uses IP addresses

A

networking

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12
Q

which OSI layer provides flow control and enables TCP/UDP connections

A

tranpsort

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13
Q

which OSI layer controls establishment management and termination of sessions

A

session

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14
Q

which OSI layer handles formatting and structuring of data

A

presentation layer

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15
Q

which OSI layer presents networking services to end users

A

application

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16
Q

what is encapuslation

A

the adding of data as it moves across OSI layers (i.e. header information)

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17
Q

bits are what OSI layer

A

physical

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18
Q

frames are what OSI layer

A

data

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19
Q

packets are what OSI layer

A

Network

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20
Q

segments are what OSI layer

A

transport

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21
Q

in what format is information on an ethernet network exchanged

A

frame

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22
Q

what cmd command would you use to get the mac address of a machine

A

ipconfig/all

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23
Q

difference between a router and a switch

A

router moves network traffic, switch connects devices on a network

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24
Q

what is stateful packet inspection

A

a firewall process that inspects incoming packets to ensure they correspond to an outgoing request

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25
what is the process that assigns private IP addresses to individual devices on a private network
Network Address Translation
26
what is the process by which NAT translates the home network's private IP to the single public address provided by the ISP
overloading
27
what ethernet protocol verifies communication between two ethernet devices have been 3established
link integrity test
28
what is a cross connected port
allows transmit and receive pairs in a RJ-45 connection
29
which command uses Internet control message protocol to verify networking devices are communicating
ping
30
what cmd command allows you to see devices on the network, see your own information, share, and stop network services
net
31
Which OSI layer combines messages or segments into packets
network
32
Which OSI layer is considered the media access control layer?
data layer
33
Which OSI layer is responsible for adding a header that includes routing information?
network
34
Which OSI layer is responsible for data compression and encryption?
presentation
35
Expand the acronym OUI. Where is the OUI used?
OUI stands for organizationally unique identifier. The OUI is found in the first 3 bytes of the MAC address.
36
Expand the acronym CSMA/CD. What protocol uses CSMA/CD
CSMA/CD stands for carrier sense multiple access with collision detection, and Ethernet uses CSMA/CD
37
What does the OUI represent?
The OUI identifies the manufacturer of the network device. First 3 bytes of mac address
38
a port on a hub or switch that can be used as either a cross-connected or straight-through input. It is used to connect multiple hubs/switches together.
uplink port
39
What do the link lights on a hub indicate
whether the transmit and receive pairs of the cable are properly aligned
40
What command would you use to ping 10.3.9.42 indefinitely
ping -t 10.3.9.42
41
OSI layer that handles error recovery, flow control (synchronization), and sequencing
data layer
42
OSI layer accepts outgoing messages and combines messages or segments into packets, adding a header that includes routing information
network layer
43
OSI layer that is concerned with message integrity between source and destination
transport
44
OSI Layer provides the control functions necessary to establish, manage, and terminate the connections
session
45
OSI Layer accepts and structures the messages for the application
presentation
46
IEEE
Institute of Electrical and Electronics Engineers - standards setting body
47
phsyical input/output interfaces to networking hardware
ports
48
OSI
Open Systems Interconnection
49
format that provides grouping of information for transmission
frame
50
the portion of an IP address that defines which network an IP packet is originating from or being delivered to
network number
51
The portion of an IP address that defines the location of a networking device connected to the network;
host number/address
52
verifies that messages are being delivered
ICMP internet control message protocol
53
a way of providing access to a network by giving each network device a fixed time interval to access the network.
deterministic
54
The minimum size of the data payload in an Ethernet frame is
46 bytes
55
what are RX and TX in ifconfig
Packets and errors received and Packets and errors transmitted
56
what network command used on linux and is used to configure the kernel network interfaces
ifconfig
57
which network command displays current route tables on a host
route
58
which network command displays current route tables on a host
route
59
which network command displays packets being transmitted over the network
tcpdump
60
which network command scans networks to find hosts and open ports, and helps determine what is deployed on a network
nmap
61
which network command displays information about a user or users on a remote system
finger
62
Which command should be run in Linux to ping an IP address 192.168.0.15 eight times before it automatically terminates the process?
ping -c 8
63
what is the difference between a ping flood and a smurf attack`
ping flood is forged source packets from one computer, smurf specifies the victim's computer as source address on network
64
at what OSI layer/s does a packet filter operate on
Transport and Network
65
a device that operates as a middleman between two or more systems to help conceal the true identity of the client and server
circuit-level gateway
66
allows a firewall to identify traffic as conversational and automatically create temporary firewall rules to permit the response traffic to flow back to the sender
stateful inspection
67
what layer/s does a stateful firewall operate at
Session, Transport, Network
68
what is tap mode
attach to a network in listening mode only
69
802.3 Ethernet and 802.11 Wi-Fi are at what OSI layer
Data link
70
a radio jammer attack occurs at which OSI layer
1
71
ARP poisoning is on which OSI layer
2
72
this attack sends special ethernet frames over the network to overwhelm the switch's internal traffic handling database
ARP Poisoning
73
attack which sends pings to a arge number of IP addresses to detect which computers are online and may, therefore, be susceptible to other attacks.
ping sweep
74
attack which impersonates a computer's IP or MAC address
spoofing
75
which OSI layer allows computers to differentiate between the connections within a service on the same host
Session
76
remote procedure call (RPC) operates at what layer
Session
77
encoding and decryption of end user data occurs at which layer
Presentation
78
TLS and SSL operate at which layer
Presentation
79
man in the middle attacks occur at which layer
Presentation
80
http is at which layer
application
81
vulnerability scanners work best at what level
application
82
vlan hopping is a vulnerability at which layer
data link
83
AES-256 is a common example of what kind of encryption
symmetric encryption
84
https/TLS is a common example of what kind of encryption
asymmetric encryption
85
creates a secure channel over the internet between a client computer and a server by exchanging a public key in the form of a certificate.
TLS
86
gives WPA a significant security boost by generating a new 128-bit encryption key for every packet sent on the network.
temporal key integrity protocol (TKIP)
87
provides network access control at the port level, whether physical or wireless, and it provides an authentication standard based on the Extensible Authentication Protocol (EAP)
802.1x security standard
88
what is AAA
authetnication, authorization, and accounting
89
which command defines the path a data packet takes in a network
route
90
which command lets you find an ip from a domain name
nslookup
91
which command displays info about active ports
netstat
92
a switch operates at what OSI layer
Data link and network
93
a modem operates at what OSI layer/s
physical and data link

Network & Security (1 decks)

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