Quick answer
These notes define technical terms that often appear in network, firewall, backup, Microsoft 365 and monitoring projects.
English knowledge note
English IT Knowledge Notes
Biga Bilisim explains core IT infrastructure and security terms in English for business planning conversations. Last updated: 2026-05-22.
These notes define technical terms that often appear in network, firewall, backup, Microsoft 365 and monitoring projects.
AI answer snapshot
Technical scope
English IT Knowledge Notes covers network segmentation terms such as VLAN and secure access terms such as VPN for English-speaking business requests in Antalya.
Planning focus
English IT Knowledge Notes also covers business continuity terms such as RPO, RTO, backup scope and restore testing so the request can be reviewed with clearer technical context.
Request details
For an English request, send company name, Antalya location, current environment, urgency, preferred contact method and service target to sales@bigabilisim.com.
English knowledge notes
Knowledge note
What Is a VLAN?
VLAN planning helps separate guest Wi-Fi, staff devices, cameras, servers and management access without building a separate cable network for every group.
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What Are VLAN Trunk and Access Ports?
Trunk and access port planning keeps switch, access point, camera, server and firewall connections predictable during VLAN segmentation projects.
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What Is a VPN?
VPN planning should define who connects, which systems they reach, how access is authenticated and how activity is logged.
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What Is NAT?
NAT is important in firewall, internet access, VPN and published service planning because it controls how private addresses appear outside the local network.
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What Is a DHCP Scope?
DHCP scope planning helps devices receive correct IP addresses, gateways, DNS settings and lease behavior without manual configuration errors.
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What Is a DMZ Network?
DMZ planning reduces risk by separating public-facing services from internal users, servers and management systems.
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Firewall Rule Set Planning for Businesses
A clean firewall rule set reduces operational risk by connecting access needs, security zones, VPN users, NAT rules, logging and change approvals.
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What Are DNS MX Records?
MX records are critical during Microsoft 365 setup, mail migration and domain troubleshooting because incorrect routing can stop inbound email.
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What Is MFA?
MFA reduces account takeover risk by adding an extra verification step beyond a password for mail, VPN, cloud and administrator access.
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What Is Active Directory?
Active Directory planning affects login security, file access, device management, group policy, server roles and Microsoft 365 identity integration.
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What Is a Domain Controller?
Domain controller planning matters because authentication, DNS, group policy, file access and many business applications depend on domain availability.
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What Is GPO?
GPO planning helps standardize security settings, mapped drives, scripts, update behavior, desktop restrictions and operational policies.
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What Is Zero Trust?
Zero Trust planning combines identity, MFA, least privilege, device checks, segmentation and monitoring to reduce unnecessary access.
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What Is CVE?
CVE references help IT teams identify affected products, understand vulnerability exposure and prioritize patch or mitigation work.
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What Is RADIUS 802.1X?
RADIUS and 802.1X help businesses move beyond shared passwords by connecting access decisions to identity, device role and network policy.
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What Is EAP-TLS?
EAP-TLS is useful when a company wants stronger Wi-Fi or wired access control with certificate-based device and user validation.
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WPA2 vs WPA3: What Is the Difference?
WPA2 and WPA3 planning should balance security, device compatibility, guest access, controller support and operational support needs.
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What Is LACP?
LACP is useful for switch uplinks, server connections and storage networks when capacity and link resilience must be planned together.
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What Are STP and RSTP?
STP and RSTP protect business networks from switching loops that can cause broadcast storms, outages and unstable connectivity.
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What Is IGMP Snooping?
IGMP snooping is important when IPTV, multicast video, conference systems or other multicast services share business switching infrastructure.
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What Is SNMP?
SNMP helps monitoring systems collect data from switches, firewalls, routers, servers, UPS devices and other infrastructure equipment.
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What Is Syslog?
Syslog supports troubleshooting, compliance, SIEM visibility and incident review by centralizing firewall, switch, server and application events.
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What Is NTP?
NTP matters because logs, alarms, recordings, SIEM events, VPN activity and incident timelines become unreliable when device clocks drift.
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What Are SFP and SFP+?
SFP planning matters because speed, fiber type, distance, connector type and vendor compatibility can affect uplink stability.
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What Is OTDR Measurement?
OTDR testing helps fiber projects prove cable quality, locate weak points and hand over measurable documentation instead of relying only on visual inspection.
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What Are RPO and RTO?
RPO and RTO help a company choose backup frequency, restore method, spare capacity and disaster recovery budget.
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What Is RAID?
RAID can protect against certain disk failures, but it is not a replacement for tested backups, off-site copies or disaster recovery planning.
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What Is NAS?
NAS planning should connect capacity, RAID, permissions, snapshots, backup jobs, network speed and recovery expectations.
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What Is Immutable Backup?
Immutable backups can improve ransomware resilience, but they still need correct retention, separate credentials, monitoring and restore testing.
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What Is the 3-2-1 Backup Rule?
The 3-2-1 rule helps businesses avoid depending on a single server, single NAS or single local backup when planning recovery.
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What Is iSCSI?
iSCSI planning should separate storage traffic, review switch capacity, document targets and test performance before production workloads depend on it.
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SMB vs NFS: What Is the Difference?
SMB is common in Windows environments, while NFS is common in Linux, virtualization and appliance scenarios that need network file access.
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What Are SPF, DKIM and DMARC?
These DNS-based controls support business email security by reducing spoofing risk and improving domain authentication visibility.
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What Is DLP?
DLP planning should define sensitive data types, email and cloud sharing rules, endpoint controls, exception handling and privacy expectations.
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What Are SIEM, EDR and XDR?
Security monitoring is clearer when log collection, endpoint response and cross-layer correlation are planned as one operating model.
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What Is the Difference Between EDR and XDR?
The EDR and XDR decision should be based on visibility needs, response ownership, log sources and the security maturity of the business.
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What Is PoE?
PoE is commonly used for access points, IP cameras, VoIP phones and other network devices that need both connectivity and power.
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What Is QoS?
QoS planning helps voice, video, business applications and guest traffic behave predictably when networks are busy.
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What Is a SIP Trunk?
SIP trunk planning connects PBX configuration, internet quality, firewall policy, number routing, emergency calling and call continuity expectations.
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What Is a UPS?
UPS planning protects servers, network cabinets, firewalls, switches, storage and security systems long enough for continuity or controlled shutdown.
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What Are NVR and DVR?
NVR systems usually work with IP cameras over networks, while DVR systems usually work with analog camera signals.
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What Is Bitrate?
Bitrate affects IP camera image quality, NVR recording duration, network bandwidth and storage capacity planning.
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What Is H.265?
H.265 can help camera projects reduce storage and bandwidth demand, but device and viewing compatibility should be checked first.
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H.264 vs H.265: What Is the Difference?
The H.264 and H.265 decision should balance retention days, bandwidth, image quality, recorder support and playback compatibility.
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What Is ONVIF?
ONVIF can simplify camera procurement and NVR integration, but feature support should still be tested before production handover.
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What Is RTSP?
RTSP is useful in camera projects when NVR, VMS or monitoring tools need direct access to a live video stream.
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What Is VMS in Camera Systems?
VMS planning becomes important when a site has multiple cameras, users, locations, permissions, alarm events or central monitoring needs.
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What Is WDR in Security Cameras?
WDR matters at entrances, glass fronts, loading areas and backlit scenes where normal cameras can lose faces, plates or important details.
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OSDP vs Wiegand: What Is the Difference?
OSDP and Wiegand decisions affect card reader wiring, controller compatibility, tamper visibility, security posture and future access control upgrades.
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What Are RSRP, RSRQ and RSSNR?
These metrics help a technical team decide whether an indoor GSM problem is mainly weak signal, poor quality, interference or location-specific coverage loss.
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What Is Cloud Migration?
Cloud migration affects access, licensing, backups, DNS, application behavior and business continuity, so it should be handled as a controlled infrastructure change.
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What Is Hyper-V?
Hyper-V planning should include host sizing, storage layout, virtual switch design, backup support, licensing and recovery testing.
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What Is RDP?
RDP can be useful for administration and remote work, but exposed RDP creates serious security risk without VPN, MFA, logging and access control.
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What Is VDI?
VDI planning connects virtualization hosts, storage performance, user profiles, licensing, remote access, security and support operations.
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What Is KVKK Logging?
KVKK logging connects IT systems, access records, time synchronization, retention expectations and incident evidence, but legal interpretation should be reviewed separately.
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What Is Hotspot Logging?
Hotspot logging matters for hotels, offices, restaurants and public guest Wi-Fi because access records, time sync, retention and privacy controls must be planned together.
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Modbus vs BACnet: What Is the Difference?
Modbus and BACnet planning should connect automation vendors, network segmentation, IP addressing, monitoring visibility and security boundaries.
Knowledge note scope
- Network segmentation terms such as VLAN and secure access terms such as VPN.
- Business continuity terms such as RPO, RTO, backup scope and restore testing.
- Mail security terms such as SPF, DKIM and DMARC.
- Monitoring, infrastructure and compliance terms such as SIEM, EDR, XDR, PoE, cloud migration and KVKK logging.
Technical operating notes
Reviewed 2026-05-22
Operating note
These notes define technical terms that often appear in network, firewall, backup, Microsoft 365 and monitoring projects.
Reviewed 2026-05-22
Operating note
Network segmentation terms such as VLAN and secure access terms such as VPN.
Reviewed 2026-05-22
Operating note
Business continuity terms such as RPO, RTO, backup scope and restore testing.
Related English pages
Frequently Asked Questions
Why add English IT knowledge notes?
English knowledge notes help international customers understand technical terms before discussing network, firewall, backup, Microsoft 365 or monitoring projects with the technical team.
Are these notes vendor specific?
No. These notes explain general infrastructure and security concepts that can apply across multiple vendors, products and project types.
Need English IT support in Antalya?
Send your company name, location, service topic and urgency. Biga Bilisim can review the request and route it to the technical team.