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SCM-AWS-Cantrillo > Tech Fundamentals > Flashcards

Tech Fundamentals Flashcards

(73 cards)

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1
Q

OSI layers

A

The OSI (Open Systems Interconnection) model is a conceptual framework that describes the communication functions of a telecommunication or computer system. The model is divided into seven layers, each of which performs a specific function in the transmission of data between networked devices. These layers are designed to provide a standardized approach to network communication, allowing different types of devices to communicate with each other regardless of their underlying hardware or software. By understanding the functions of each layer in the OSI model, network engineers and IT professionals can design, implement, and troubleshoot complex networks more efficiently and effectively

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2
Q

Layer 1

A

Layer 1, also known as the physical layer, is the first and lowest layer in the OSI model. It is responsible for the physical transmission of data over a communication channel, such as a wire, cable, or wireless signal. This layer defines the physical characteristics of the communication medium, including voltage levels, cable types, and signaling methods, to ensure that data is transmitted accurately and reliably between devices.

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3
Q

Layer 2 Data link Frame

A
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4
Q

Layer2 CSMA/CD

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5
Q

L2 Summary

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6
Q

Building L3 Network

A
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7
Q

IPv4 and V6 packet structure

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8
Q

L3 IpV4 Addressing

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9
Q

L3 Subnet mask

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10
Q

L3 Routing

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11
Q

L3 ARP

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12
Q

IP routing via routers

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13
Q

L3 Summary

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14
Q

L3 Problems

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15
Q

L4 TCP Vs UDP

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16
Q

TCP Segments

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17
Q

TCP based connection flow

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18
Q

TCP 3 way connection

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19
Q

L4 StatelesVsstateful

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20
Q

StaticNAT

A
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21
Q

DynamicNAT

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22
Q

PAT

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23
Q

Ipv4 Addressing Fundamentals

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24
Q

IPV4 addressing space

A
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25
IPv4 Addressing and subnetting
26
IPV6 Addressing space
27
IP Subnetting with address space example
28
Normal Web based architecture with no DDOS attack
29
Application Layer DDOS attack
30
Protocol DDOS Attack
31
Volumetric Amplification DDOS attack
32
L2 Single switch problems to support multiple teams
33
L2 Multi Switch Multi Team problems
34
Q&Q Frame Tagging
35
Q&Q packet flow in VLAN
36
VLAN 101
37
Explain SSL and TLS key exchange
38
Explain BGP
39
StatelessVsStateFul Firewall
40
Stateless Firewall flow
41
Stateful firewal flow
42
JumboFrame usage in AWS
43
Advantage of using Jumbo Frame
44
Problems with jsut L3/4/5 firewall
45
L7 firewall sequence
46
IPSEC Fundamentals
47
IKE1
48
IKE2
49
RouteVsPolicy
50
FiberOptics Cable Physics
51
FiberOptics 101
52
Fiber Optics SingleMode VS Multimode
53
Encryption 101
54
Symmetric Encryption
55
Asymmetric Encryption
56
Signing in Encryption
57
Steganography
58
Envelope Encryption/Decryption
59
HSM Problem and solution
60
HSM architecture
61
Hashing101
62
Hashing Example usecase
63
Digital Signature flow
64
DNS 101
64
DNS Why Not one server
65
DNS Key Terms
66
DNs Walking the tree
67
Register domain
68
DNSSEC101
69
DNS sec problem callflow
70
ZSK
71
DNSKEY
72
Key Signing Key

SCM-AWS-Cantrillo (2 decks)

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