Network+

802.1d

STP

802.1q

VLAN

FHRP

First Hop Redundancy Protocol

LACP

Link Aggregation Control Protocol, a network protocol that automatically combines several physical links to create a single logical link to increase bandwidth and provide redundancy.

IGP

Interior Gateway Protocol - OSPF, RIP, EIGRP

EGP

Exterior Gateway Protocol - BGP

MTTR

Mean Time to Repair

MTBF

Mean Time between Failures

RTO

Recovery Time Objective - Max time a business can be down for (how long it would take to install a backup)

RPO

Recovery Point Objective - How much data a business can lose, measured in time (i.e. loss of 4 hours of data)

MTD

Max Tolerable Downtime - Longest Period of time a business can be inoperable

OSI Layer 1

Physical

OSI Layer 2

Mac Address (Frame)

OSI Layer 3

IP Routing (Packet)

OSI Layer 4

TCP UDP (Transport) (Segments and Datagrams)

OSI Layer 5 6 7

DNS, DHCP, FTP (Session, Presentation, Application) (Data)

show interface

stats for network interface

show config

shows startup configuration for interface (i.e. DNS, tacacs+, STP, syslog, etc)

show route

displays routing table

show mac-address-table

shows what MAC is attached to the port

show arp

MAC and IP pairs

show vlan

shows what VLAN’s are attached to what interfaces

show power

POE settings per port

syslog level 0

Emergency

syslog level 1

Alert

syslog level 2

Critical

syslog level 3

Error

syslog level 4

Warning

syslog level 5

Notice

syslog level 6

information

syslog level 7

debugging

VIP

Virtual IP, Shared IP address for accessing services

Teredo Tunneling

Tunnels IPv6 devices in an IPv4 Network

NAT Gateway

allows resources within a Virtual Private Cloud (VPC) to access the internet without being directly exposed to the internet

jump box/host/server

hardened and monitored device that spans two dissimilar security zones and provides a controlled means of access between them

SAML

Security Assertion Markup Language - Exchange Auth data between parties for SSO

SOAP

Simple Object Access Protocol - Used by API’s to communicate, higher security than REST

REST

Representational State Transfer - Straightforward communication for API’s

VXLAN

Virtual Extensible LAN - Far more possible LAN’s due to VNI (VXLAN network Identifier)

Netflow Analyzer

Monitors network traffic flow data

IP Scanner

Finds every IP connected to the network

dig

query dns for info

SIP

Session Initiation Protocol, Porto 5060/5061, initiates and maintains voice, video, and messaging sessions.

IPsec

Auth and Encryption for packets between 2 computers over an IP Network

CDP and LLDP

Discovery Protocols

SD-WAN

Software Defined WAN

EUI-64

Automatic IPv6 Config

POTS

Plain old telephone server (2 Pins)

Defense in Depth

Layered CyberSec Security Measures to Protect Info

MS-CHAPv2

Microsoft Authentication Protocol for NAC

Network Security Lists

Traffic Flow and Security Control for Cloud resources

Split Horizon

Blocks routing loops at layer 3

BPDU

Bridge Protocol Data Unit - Used by STP to stop switching loops

Visual Fault Locator

Locates cracks, bends, etc in fiber cables

Wet Pipe

Most Basic and common, releases water when fire alarms go off. Avoid use in data centers for obvious reasons

Pre-action

Minimizes risk of accidental releases. Better version of wet pipe, 2 sensors must be tripped for water to be released

Special Suppression System

Clean agent instead of water (Halo-carbon or inert gas), suffocates people.

PAP

Password Authentication Protocol (Old and Weak Auth)

Stateless

Preconfigured Parameters for Firewall

Stateful

Intelligent Firewall, makes decisions based on learned parameters