Notes

Automation- 
Ansible - SSH, TCP, PORT 22,YAML. Linux, UNIX, Windows. Playbooks. 
Chef - HTTPS, TCP PORT 443. LINUX/UNIX/WINDOWS - CLIENT/SERVER. COOKBOOKS.
Salt - Port 4505 & 4506. LINUX/UNIX/WINDOWS. CLIENT/SERVER. USES PYTHON & YAML.
Puppet - HTTPS, TCP, PORT 8140. Ruby.

SOUTHBOUND-API - 
NETCONF - uses XML  
OpFlex - Declarative SDN model 
OPENFLOW - Imperative SDN model 
OnePK - Cisco proprietary API 

Wireless Security -
WEP - RC4 - 40 bit encryption 
WPA - TKIP (TEMPORAL KEY INTEGRITY PROTOCOL) 
WP2 - AES 256 (ADVANCED ENCRYPTION STANDARD), CCMP 
WPA3 - AES 256 - 192-bit security while still using the 802.1x standard
WPS (Wifi protected service) - Easy to join wireless network, push button to connect to network (usually physical button on router)

FHRP - 
VRRP - 0000.5E00.01
GLBP  - 0007. b400. XXYY
HSRP - 0000.0C07. AC00

LLDP - 
Advertisements 30 seconds 
Retains information for 120 seconds
CDP - 
Advertisements 60 seconds 
Retains information for 180 seconds
LLDP Commands -
lldp run
lldp transmit 
lldp receive  

LACP - PASSIVE/ACTIVE. Active - Passive = Channel will go on.
PAgP - Desirable/Auto. Desirable - Auto = Channel will go on.


SSH Process- 
Hostname 
ip domain-name
crypto key generate rsa
transport input ssh

Frame Sizes - 
What are runts? - Ethernet Frames less than 64 Bytes.
Jumbo (Giant) Frame - >1500 bytes (With bad FCS)
Baby Giant Frame - Slightly Bigger than 1500 bytes
Babbles -The number of transmitted frames greater than 1518 bytes in size.
Late collision - Frame that errors after 512 bits 

IPv6 Addresses - 
Link local - fe80
Unique local - FC00::/8
Global - 2001:
Loopback ::1 
Multicast - FF02::1 & FF02::2

Port Security - 
Restrict - Security Violation counter 
Protect - Discard traffic if received from unknown port 
Shutdown - Shutdown port if traffic is received from unknown port 

WLC Interfaces - 
AP Manager interface - Controls L3 communications between WLC & AP.
Management interface - Used for in-band management. Used for all L2 LWAPP communication between controller and LW AP's.
Service port - Used for maintenance on the WLC if the device fails and is used when booting.
virtual interface -  Provides same IP address that is used across multiple controllers, this allows multiple client roaming. 
Dynamic interfaces - can be up to 512, used for client data and segments traffic (like a vlan). 

WLC GUI - 
TYPE
PROFILE NAME 
SSID 
VLAN ID

Spanning Tree -
STP - 802.1d
RSTP - 802.1w
MSTP - 802.1s

OSPF -
Router ID 
Loopback 
Highest IP 

EIGRP - 
Cisco Proprietary 
Unequal & Equal load Balancing 
A successor is the route with the best metric to reach a destination. That route is stored in the routing table. A feasible successor is a backup path to reach that same destination that can be used immediately if the successor route fails.

Syslog -
(E)very 
(A)wesome 
(C)isco 
(E)ngineer 
(W)ill 
(N)eed 
(I)cecream 
(D)aily

Password - 
Enable Secret - encrypts clear text password for enable mode. 
enable password - clear text password 
password *number* - configures encrypted vty password 

SNMP - 
MANAGER 
AGENT 
MIB (MANAGEMENT INFORMATION BASE)


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