Quick Revision

GK One-Line Question & Answer

15541+ short questions with short answers, covering every category and sub-category on the site — no long articles to scroll through. Good for a fast recap before an exam, or a few minutes of daily practice.

Looking for exam process/strategy questions instead? Try the Exam Preparation FAQ →

Computer Networks → Introduction to Computer Networks 30

Mininet is
Network emulator for SDN research running real network stack
click to copy
GNS3 is used for
Network simulation with real OS images for lab testing
click to copy
ONAP is used for
Telecom network service orchestration and automation
click to copy
VIM in NFV stands for
Virtual Infrastructure Manager
click to copy
MANO in NFV stands for
Management and Orchestration
click to copy
SFC stands for
Service Function Chaining
click to copy
NSH in SFC stands for
Network Service Header
click to copy
PLR in MPLS FRR is
Point of Local Repair
click to copy
BFD minimum detection time can be
Few milliseconds for sub-second failure detection
click to copy
NETCONF operations include
GET EDIT-CONFIG LOCK UNLOCK COPY-CONFIG COMMIT
click to copy
YANG module defines
Structure of configuration and operational data
click to copy
RESTCONF provides
REST API access to NETCONF datastore
click to copy
gNOI stands for
gRPC Network Operations Interface
click to copy
Napalm in automation supports
Multiple vendor network OSes with unified API
click to copy
pyATS Genie provides
Automated parsing and testing framework for network devices
click to copy
Prometheus scrapes metrics via
HTTP pull requests to targets
click to copy
PromQL is used for
Metrics queries and alerting in Prometheus
click to copy
Grafana datasources include
Prometheus InfluxDB Elasticsearch and many others
click to copy
TIG stack stands for
Telegraf InfluxDB and Grafana
click to copy
Jaeger and Zipkin are for
Distributed tracing
click to copy
Splunk is used for
Enterprise security and operations intelligence
click to copy
Network baseline establishes
Normal performance metrics for comparison
click to copy
Synthetic monitoring
Proactively tests from simulated user perspective
click to copy
RUM stands for
Real User Monitoring
click to copy
APM stands for
Application Performance Monitoring
click to copy
NTLM is
NT LAN Manager authentication protocol
click to copy
ECC vs RSA advantage is
Same security with smaller keys
click to copy
Hash function is one-way meaning
Cannot derive input from output
click to copy
SHA-256 output is
256 bits
click to copy
HMAC adds to hash
Secret key for message authentication
click to copy

Computer Networks → HTTP and HTTPS 10

HTTP CONNECT method is used for
Establishing tunnel for HTTPS through proxy
click to copy
HTTP HEAD method returns
Headers only without body
click to copy
HTTP PUT method
Creates or replaces entire resource
click to copy
HTTP PATCH method
Partially updates existing resource
click to copy
HTTP OPTIONS method
Returns allowed methods for a resource
click to copy
HTTP status 301 means
Moved Permanently (redirect)
click to copy
HTTP status 401 means
Unauthorized (authentication required)
click to copy
HTTP status 403 means
Forbidden (authenticated but not authorized)
click to copy
HTTP status 404 means
Not Found
click to copy
HTTP status 500 means
Internal Server Error
click to copy