Terms to know Flashcards
SOHO router
Small office/home office (SOHO) routers are a staple networking appliance for millions of consumers. They are often the single point of ingress and egress from a SOHO network, manage domain name resolution, firewall protections, dynamic addressing, wireless connectivity, and of course, routing.
Dynamic ARP Inspection (DAI)
dedicated security mechanism that prevents ARP attacks by activating DHCP snooping
router advertisement (RA) guard
In IPv6, a router periodically sends a special type of message to announce its presence on the network. A mechanism that allows to filter these messages
BCP
business continuity planning (BCP) involves preparing for and avoiding potential disruptions to your business operations.
MPLS
Multiprotocol Label Switching. Packets through the WAN have a label. Routing decisions are easy and faster.
WAN TECHNOLOGY.
Used for real time connections such as voice and video calls.
OCSP
The Online Certificate Status Protocol (OCSP) is an alternative to the certificate revocation list (CRL) and is used to check whether a digital certificate is valid or if it has been revoked.
three tier architecture
core-center of network
distribution- midpoint between access and core
access- where the users connect
SDN
Software defined networking.
Networking devices have different functional planes of operation.
ex: infrastructure layer/data plane
control layer/ control plane
application layer/ management plane
spine and leaf
each leaf switch connects to each spine switch.
Spine switches do not connect to each other.
leaf switches do not connect to each other.
difference between nas and san
A NAS is a single storage device that serves files over Ethernet and is relatively inexpensive and easy to set up, while a SAN is a tightly coupled network of multiple devices that work with block-based data and is more expensive and complex to set up and manage.
SCADA System
Supervisory Control and Data Acquisition System
Control industrial processes locally or at remote locations.
DHCP snooping
drops DHCP traffic determined to be unacceptable
oui
organizationally unique identifier. The manufacturer address.
half duplex
a device cannot send and receive at same time. All LAN hubs are half duplex. Switch interfaces can be configured as half-duplex but only when connecting to another half duplex device.
full duplex
data can be sent and received at same time. A properly configured switch interface will be set to full-duplex. A duplex mismatch occurs when one device is set to full and one is set to half.
DAD
Duplicate Address Detection
Neighbor Discovery Protocol used by IPv6 that detects duplicate IPs.
802.1Q
Vlan trunking, takes away the need for ethernet cable to connect vlans.
jumbo frame
9000 byte payload. giant frame is frame more than 1500 is too large because no configuration. runt is frame smaller than 64 bytes.
MIC
Message integrity check used by Hashing Algorithms. verify received data is identical to sent data.
SAE
simultaneous authentication of equals used in WPA3-Personal. everyone has a different session key even with the same psk so that brute force attacks are rendered useless.
Jitter
time between frames. excessive jitter can cause you to miss information, “choppy” voice calls.
MIB
management information base. ITS WITHIN SIMPLE NETWORK MANAGEMENT PROTOCOL, monitors all network devices. object identifier units
CRC
A cyclic redundancy check (CRC) is an ERROR DETECTING code commonly used in digital networks and storage devices to detect accidental changes to digital data.
snmpv1
snmpv2
snmpv3
no security
more data option no security
very secure
