Messer Notes 4 Flashcards
Stratum 0
Atomic clock, GPS clock
Stratum 1
synchronized to stratum 0 servers
Core of network
the center of the network
web server
Distribution
A midpoint between the core and the user
Access
where the users connect
SDN
software defined networking
data, control, and management plane
spine and leaf
leaf to spine or leaf to spine connection
Top-of-rack
east-west traffic
traffic between devices in the same data center
North-south traffic
ingress/egress to an outside device
a different security posture than east-west
Branch office
a remote location
client devices, printer, switch/router/firewall
On-premises data center
Technology is located in-house
requires power, cooling, and ongoing monitoring
Colocation
share a data center with others
local oversight and monitoring
Fiber channel
connect servers to storage
SCSI, SAS, or SATA
fiber channel switches
FCoE
Fiber channel over Ethernet
iSCSI
internet small computer system interface
make a remote disk look and operate like a local disk
