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SANS 401 GSEC Exam Study Guide 2023 with complete solution
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SANS 401 GSEC Exam Study Guide 2023 with complete solution
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SANS 401 GSEC Exam Study Guide 2023with complete solution
Network Topology - The Physical/Logical shape of a network
Logical Topology - Gives the description for the physical layout, shows VLAN's and where they are placed on the physical topology
Trunk Port - Connects packets that travel to all VLAN's on a switch
Baseband Systems - Transmits one signal on the medium (fiber, copper, etc)
Broadband - Form of multiplexing to join multiple signals on a medium
Ethernet - Designed as baseband system that can be used in multiplexing
CSMA/CD - Carrier Sense Multiple Access/ Collision Detection
Unicast - Broadcast for a single device
Multicast - Broadcast for a specific group or multiple devices
Broadcast - Message for everyone to receive and process
Hub - Broadcasts packets to every single port
Switch - Broadcasts packets to device found on a singular port
Content Addressable Memory (CAM) - Is a table that contains the MAC address and port associated to that MAC Address
Virtual LAN (VLAN) - Splitting a switch in which certain ports can only talk to certain ports (Segment networks within a switch)
Multiprotocol Label Switching (MPLS) - A different way of switching packets that can be used on a dedicated line
802.1x - Network Access Control that is a layer 2 authentication (Credentialed Question of 2FA)
A security appliance should be set in place when - There is a change in trust level in the network Protocol - is an agreement or rules of engagement for how computer networks communicate
OSI Protocol Stack (7) - Layer 7) Application
Layer 6) Presentation
Layer 5) Session
Layer 4) Transport
Layer 3) Network
Layer 2) Data Link
Layer 1) Physical
Application Layer 7 OSI Stack - Browsers, FTP, HTTP, SCP
Presentation Layer 6 OSI Stack - Makes data presentable to the application or user (ASCII)
Session Layer 5 OSI Stack - Handles the establishment/maintenance of connections between systems
Transport Layer 4 OSI Stack - Determines that application the packet should be sent to through port numbers (Web on 80,443)
Network Layer 3 OSI Stack - Moving packets from one network to another network, uses logical addressing instead of physical addressing
Data Link Layer 2 OSI Stack - Takes a packet and frames it suitable for transmission
Physical Layer 1 OSI Stack - Network cable, electromagnetic radiation
TCP/IP Protocol Stack (4) - Layer 4) Application
Layer 3) Transport (TCP/UDP)
Layer 2) Internet (IP)
Layer 1) Network
Network Address in: 10.1.2.0/24 Subnet - 10.1.2.0
Broadcast Address in: 10.1.2.0/24 Subnet - 10.1.2.255
Class A CIDR Addressing (Mask, IP Range) - N.H.H.H, 255.0.0.0 - 1-127
10.0.0.0/8
16.7 Million IP's
Class B CIDR Addressing (Mask, IP Range) - N.N.H.H, 255.255.0.0 - 128-191
172.16.0.0/16
65,536 IP's
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