Configuration, Change & Lifecycle Management
This specific state of a configuration item, also referred to as a "golden configuration," documents the approved or authorized state used to detect unexpected changes.
What is a baseline configuration?
This core software solution provides oversight and automation by scanning DHCP and DNS servers to log network address usage to a database.
What is IP Address Management (IPAM) software?
This critical resource record type is used to map a domain host name specifically to an IPv6 network address.
What is an AAAA record?
This mechanical termination tool pushes a wire conductor into an insulation-displacement connection terminal while simultaneously slicing off the excess wire.
What is a punch down tool?
This basic layer 2 protocol prevents broadcast radiation and catastrophic bridge loops by keeping redundant mesh paths in a blocking state.
What is Spanning Tree Protocol (STP)?
In a formal change management process, the need for a system modification and the exact steps to implement it are captured in this specific document.
What is a Request for Change (RFC)?
This proprietary Cisco protocol uses Data Link layer multicast messaging to send status announcements over local interfaces every 60 seconds.
What is Cisco Discovery Protocol (CDP)?
There is only one of these record types per zone, and it identifies the primary authoritative name server, administrative contact, and a serial number for version control.
What is a Start of Authority (SOA) record?
This widely deployed wiring standard dictates that the green wire pair terminates on pins 1 and 2, while the orange wire pair terminates on pins 3 and 6.
What is the T568A standard?
This standard network parameter defines the upper limit of an Ethernet frame data payload size, which is normally 1,500 bytes.
What is the Maximum Transmission Unit (MTU)?
This term describes a product that has entered a lifecycle phase where it is no longer supported by its developer, receives zero security updates, and represents a critical vulnerability.
What is an End of Support (EOS) system?
To perform a host discovery scan with Nmap and actively suppress the time-consuming port scanning phase, a technician must use this specific command switch.
What is the -sn switch?
This type of lookup zone is used when a technician performs a reverse DNS query to find the host name associated with a known IP address.
What is a reverse lookup zone?
This type of short-range, dual-conductor copper cabling is terminated using Direct Attach Copper (DAC) modules for high-speed switch uplinks in datacenters.
What is twinaxial (twinax) cable?
This advanced Cisco-proprietary distance vector protocol automates routing decisions using a composite metric based primarily on bandwidth and delay.
What is EIGRP (Enhanced Interior Gateway Routing Protocol)?
This protocol standard normally listens on UDP port 514 and provides an open format for forwarding system, security, or application events to a central log collector.
What is Syslog?
This specific Nmap technique, also referred to as half-open scanning, requests a connection by sending a packet without acknowledging the target's response.
What is a TCP SYN scan (or -sS)?
This security framework mitigates the risk of DNS spoofing and poisoning by allowing an authoritative server to sign resource record sets with a private key.
What is DNSSEC (DNS Security Extensions)?
Cable certifiers look for this value, which represents the mathematical difference between the actual measured insertion loss and the maximum loss allowed by the cable standard.
What is the margin?
This open standard First Hop Redundancy Protocol monitors the status of the "master" router and automatically selects a replacement from available backup routers if a fault occurs.
What is Virtual Router Redundancy Protocol (VRRP)?
Self-encrypting drives (SEDs) support this cryptographic erase technique, which deletes the media encryption key to render all data instantly unrecoverable.
What is Instant Secure Erase (ISE)?
This centralized software suite integrates network and security monitoring by automated collection, parsing, and normalizing of event logs across multiple distinct vendor sources.
What is a Security Information and Event Management (SIEM) system?
Designed for security and privacy, this client security protocol validates resolver digital certificates and encrypts DNS transactions over TCP port 853.
What is DNS over TLS (DoT)?
This fiber optic technology allows multiple data channels to share a single strand of fiber by transmitting over slightly shifted, individual wavelengths of light.
What is Wavelength Division Multiplexing (WDM)?
To manage networks across subnets, a router must be configured with this specific functionality to forward broadcast DHCP requests to a server on a completely different segment.
What is an IP helper (or DHCP relay agent)?