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[DIFFICULTIES] - R&S C2 : Basic Switching Concepts and Configuration
[DIFFICULTIES] - R&S C2 : Basic Switching Concepts and Configuration
boot sequence
POST - boot loader - CPU - flash file system - IOS
find IOS image
BOOT environment variable - flash file system search - initializes interfaces stored in NVRAM
auto-MDIX feature
fixes problem for straight-through
or crossover
MAC Address Flooding
CAM = Content Addressable Memory
DHCP attacks
DHCP = network protocol = automatically assign IP information
DHCP spoofing
fake DHCP server i splaced in the network to issue DHCP addresses to clients
DHCP starvation
often used before DHCP spoofing attack to deny service to the legitimate DHCP server
CDP = Cisco Discovery Protocol
discover other directly connected cisco devices
attacker listening to Cisco Discovery Protocol messages can learn important information about device model / running software version
DHCP Snooping
which switch ports can respond to DHCP requests
secure mac addresses
static secure MAC addresses
dynamic secure MAC addresses
Sticky secure MAC addresses
Violation modes : when fe MAC address want to access interface
protect
restrict
shutdown
NTP = Networyk Time Protocol
sync time of computers
full duplex = send and receive simultaniously
runts and giants