Important things to remember Flashcards
RIP AD and Letter
AD 120, R
OSPF AD Letter
AD 110, O
Static AD and Letter
AD 1, S
Directly connected AD and Letter
AD 0, C
Floating Static route
Route with artificially high AD, insuring its used as a last resort/back up
Default console settings for emulators or Putty.
Bits/sec 9600, Data bits 8, Stop Bits 1 and no parity
Command to save running config to start up config
copy running-config startup-config
Hub broadcast/collision domains
1 of each.
Switch broadcast/collision domains
1 broadcast domain until separated by a router. number of active interfaces = number of collision domains.
RSTP port states
Discarding, Learning, Forwarding
STP port states
Disabled, Blocking, Learning, Listening, Forwarding.
STP port costs
FA = 19, GE = 4.
802.1x
RADIUS
DCE
Plugged into device that provides the clock.
DTE
The side that isnt the side thats plugged into the clocking side.
HLDC
DCE/DTE alternative to traditional L2 frames.
3 types of roles that a router can have in OSPF
DR, BDR, DRother.
what are the types of LSAs for OSPF?
Type 1 = only its local connections.
Type 2 = only generated by the DR, gives connections known on its network.
Underlay
how a packet gets through the network. Interior Gateway Protocols such as IGP, OSPF, EIGRP, IS-IS and BGP.
Overlay
Something on top of the Underlay IE: IPSEC/VPNs. so it can go through a network in a tunnel. can show something far away as 1 hop away.
Fabric
An overlay on top of an underlay controlled by a controller.
Data plane
How data is sent from 1 node to the next (infrastructure)
Control plane
How data knows what the next hop is (like underlay)
EIGRP AD and Letter
90 and D
LLDP
CDP but industry standard
Syslog Severity & level
Emus - Emergency 0
Are - Alert 1
Cute - Critical
Even - Error
When - Warning
Not - Notice
In - Informational
Disguise - Debug 7
PoE+
802.3at
PoE
802.3af
Global IPV6
2000:: /3 (2000-3FFF)
Multicast IPV6
FF00 /8
Link local IPv6
- FE80:: /10 First 10 (1111 1101 10)
- take 64 bit mac, split it into 2, 32 bit halves
- Put the mac in-between.
- Flip the 7th bit.
- Place the number from steps 2-4 right after FE80:
Classification
Classifies based on almost anything/ (Port/Vlan/Source/anything)
Marking
Like a shipping label, traverses network without opening packet.
Layer 2 CoS
Layer 3 ToS
Policing
enforces rate limit by dropping down or marking the packets. can slow down traffic that you don’t like.
Shaping
enforces rate limit by delaying the packets and store them in the router’s buffer for a certain amount of time.
