SANS 401 GSEC Exam
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Network Topology The Physical/Logical shape of a network
Gives the description for the physical layout, shows
Logical Topology VLAN's and where they are placed on the physical
topology
Trunk Port Connects packets that travel to all VLAN's on a switch
Transmits one signal on the medium (fiber, copper,
Baseband Systems
etc)
Form of multiplexing to join multiple signals on a
Broadband
medium
Designed as baseband system that can be used in
Ethernet
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 Is a table that contains the MAC address and port
Memory (CAM) associated to that MAC Address
Splitting a switch in which certain ports can only talk
Virtual LAN (VLAN)
to certain ports (Segment networks within a switch)
Multiprotocol Label A different way of switching packets that can be used
Switching (MPLS) on a dedicated line
, Network Access Control that is a layer 2
802.1x
authentication (Credentialed Question of 2FA)
A security appliance There is a change in trust level in the network
should be set in place
when
is an agreement or rules of engagement for how
Protocol
computer networks communicate
Layer 7) Application
Layer 6) Presentation
Layer 5) Session
OSI Protocol Stack (7) Layer 4) Transport
Layer 3) Network
Layer 2) Data Link
Layer 1) Physical
Application Layer 7 OSI Browsers, FTP, HTTP, SCP
Stack
Presentation Layer 6 OSI Makes data presentable to the application or user
Stack (ASCII)
Handles the establishment/maintenance of
Session Layer 5 OSI Stack
connections between systems
Transport Layer 4 OSI Determines that application the packet should be sent
Stack to through port numbers (Web on 80,443)
Moving packets from one network to another
Network Layer 3 OSI
network, uses logical addressing instead of physical
Stack
addressing
Data Link Layer 2 OSI Takes a packet and frames it suitable for transmission
Stack
Physical Layer 1 OSI Stack Network cable, electromagnetic radiation
Layer 4) Application
Layer 3) Transport (TCP/UDP)
TCP/IP Protocol Stack (4)
Layer 2) Internet (IP)
Layer 1) Network
Save
Network Topology The Physical/Logical shape of a network
Gives the description for the physical layout, shows
Logical Topology VLAN's and where they are placed on the physical
topology
Trunk Port Connects packets that travel to all VLAN's on a switch
Transmits one signal on the medium (fiber, copper,
Baseband Systems
etc)
Form of multiplexing to join multiple signals on a
Broadband
medium
Designed as baseband system that can be used in
Ethernet
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 Is a table that contains the MAC address and port
Memory (CAM) associated to that MAC Address
Splitting a switch in which certain ports can only talk
Virtual LAN (VLAN)
to certain ports (Segment networks within a switch)
Multiprotocol Label A different way of switching packets that can be used
Switching (MPLS) on a dedicated line
, Network Access Control that is a layer 2
802.1x
authentication (Credentialed Question of 2FA)
A security appliance There is a change in trust level in the network
should be set in place
when
is an agreement or rules of engagement for how
Protocol
computer networks communicate
Layer 7) Application
Layer 6) Presentation
Layer 5) Session
OSI Protocol Stack (7) Layer 4) Transport
Layer 3) Network
Layer 2) Data Link
Layer 1) Physical
Application Layer 7 OSI Browsers, FTP, HTTP, SCP
Stack
Presentation Layer 6 OSI Makes data presentable to the application or user
Stack (ASCII)
Handles the establishment/maintenance of
Session Layer 5 OSI Stack
connections between systems
Transport Layer 4 OSI Determines that application the packet should be sent
Stack to through port numbers (Web on 80,443)
Moving packets from one network to another
Network Layer 3 OSI
network, uses logical addressing instead of physical
Stack
addressing
Data Link Layer 2 OSI Takes a packet and frames it suitable for transmission
Stack
Physical Layer 1 OSI Stack Network cable, electromagnetic radiation
Layer 4) Application
Layer 3) Transport (TCP/UDP)
TCP/IP Protocol Stack (4)
Layer 2) Internet (IP)
Layer 1) Network
