--- title: How we test backup and replication over WAN | TEST4NET description: "Backup and replication over a WAN emulator with your delay, jitter and loss: throughput per stream, stream count, dedup, replication lag, restore, failover" image: https://test4net.com/hubfs/blog-covers/how-we-test-backup-and-replication-over-wan.png --- [Skip to content](https://test4net.com/blog/how-we-test-backup-and-replication-over-wan#main-content) [![TEST4NET](https://test4net.com/hubfs/test4net-logo-fixed-2.svg)](https://test4net.com/?hsLang=en) - Services - Products - Resources - Company - [English](https://test4net.com/blog/how-we-test-backup-and-replication-over-wan) - [Русский](https://test4net.com/ru/blog/how-we-test-backup-and-replication-over-wan) - [Հայերեն](https://test4net.com/hy/blog/how-we-test-backup-and-replication-over-wan) [News](https://test4net.com/news?hsLang=en) [Login](https://lab.test4net.com) [Support](https://test4net.com/support?hsLang=en) - [English](https://test4net.com/blog/how-we-test-backup-and-replication-over-wan) - [Русский](https://test4net.com/ru/blog/how-we-test-backup-and-replication-over-wan) - [Հայերեն](https://test4net.com/hy/blog/how-we-test-backup-and-replication-over-wan) What we test By technology Industries [Load & Performance Testing Throughput, sessions and latency up to and past the rated limit](https://test4net.com/services/load-performance-testing?hsLang=en) [Functional & Conformance Testing Features against the spec, RFC compliance with evidence](https://test4net.com/services/functional-conformance-testing?hsLang=en) [Interoperability Testing Multi-vendor behaviour, before it reaches production](https://test4net.com/services/interoperability-testing?hsLang=en) [Security & Resilience Testing NGFW, IPS and VPN efficacy and performance with threats on the wire](https://test4net.com/services/security-resilience-testing?hsLang=en) [Test Plan & Methodology Design What to test, how, and what counts as a pass](https://test4net.com/services/test-plan-design?hsLang=en) [Test Automation & CI/CD Regression suites wired into your release pipeline](https://test4net.com/services/test-automation?hsLang=en) [Training Programs Hands-on courses for your test engineers](https://test4net.com/services/training-programs?hsLang=en) [Equipment Repair Repair and verification of test equipment](https://test4net.com/services/equipment-repair?hsLang=en) [All services](https://test4net.com/services?hsLang=en) [Routing & Switching RFC 2544 and RFC 2889 on real ports, 1G to 100G](https://test4net.com/solutions/routing-switching?hsLang=en) [Firewalls & NGFW RFC 9411 throughput with inspection switched on](https://test4net.com/solutions/firewalls-ngfw?hsLang=en) [SD-WAN & WAN Path selection and QoS under emulated WAN conditions](https://test4net.com/solutions/sd-wan?hsLang=en) [Cloud & NFV Virtual appliances and cloud services under load](https://test4net.com/solutions/cloud-nfv?hsLang=en) [5G & Mobile Core Transport and core functions under subscriber traffic](https://test4net.com/solutions/5g-mobile-core?hsLang=en) [Wi-Fi Wi-Fi 6 clients and access points, Wi-Fi 7 in progress](https://test4net.com/solutions/wi-fi?hsLang=en) [Storage & Infrastructure Storage networks and servers under realistic I/O](https://test4net.com/solutions/storage?hsLang=en) [AI / Switching Fabric (RoCEv2) Lossless Ethernet for GPU clusters: PFC, ECN, fabric load](https://test4net.com/solutions/ai-fabric-rocev2?hsLang=en) [All technologies](https://test4net.com/services#coverage) [Telecom Operators Pre-deployment acceptance and vendor comparison](https://test4net.com/solutions/industries#telecom) [Network & Security Vendors Independent validation of your product claims](https://test4net.com/solutions/industries#vendors) [System Integrators Proof for the customer before the rollout](https://test4net.com/solutions/industries#integrators) [Enterprise & Banks Upgrades and new platforms checked before production](https://test4net.com/solutions/industries#enterprise) [All industries](https://test4net.com/solutions/industries?hsLang=en) Not sure where to start? Test plan and quote in 1–3 business days Tell us what you run and what worries you. We propose the tests, tools and timeline. [Request a test plan](https://test4net.com/contacts?hsLang=en) CloudLAB [How It Works Pick a scenario, run it in the live lab, get the report](https://test4net.com/cloudlab#how) [Equipment & Capabilities L2-3 to 100G, L4-7 past 200G, Wi-Fi, WAN emulation](https://test4net.com/cloudlab#equipment) [Access Plans Hourly sessions, subscriptions, dedicated racks](https://test4net.com/cloudlab/plans?hsLang=en) [Hosted DUT Testing Ship the box or upload the VM, we run the tests](https://test4net.com/cloudlab/hosted-dut?hsLang=en) [Open the CloudLAB portal](https://lab.test4net.com) Our tools [Traffic Generator L4-7 and security traffic past 200 Gbit/s, app mix library](https://test4net.com/products/traffic-generator?hsLang=en) [WANemu Delay, jitter, loss and bandwidth shaping per link](https://test4net.com/products/wanemu?hsLang=en) [Book a demo](https://test4net.com/contacts?hsLang=en) New: our own test tools Our own tools, in beta this autumn Built in our lab, priced per gigabit. Join the beta list and see them first. [Join the beta list](https://test4net.com/products#lead-form) Read Technologies / Protocols Methodologies [Blog Case studies, test insights and lab notes](https://test4net.com/blog?hsLang=en) [Industry News What is changing in network testing and infrastructure](https://test4net.com/news?hsLang=en) [FAQ How the lab, sessions and reports work](https://test4net.com/faq?hsLang=en) [Glossary Network testing terms in plain words](https://test4net.com/glossary?hsLang=en) [All resources](https://test4net.com/resources?hsLang=en) [BGP Route exchange, policy and convergence](https://test4net.com/blog/how-we-test-bgp?hsLang=en) [OSPF & IS-IS IGP adjacency, flooding and SPF timing](https://test4net.com/blog/how-we-test-ospf-is-is?hsLang=en) [MPLS & SR LDP, RSVP‑TE and SR‑MPLS label paths](https://test4net.com/blog/how-we-test-mpls-and-segment-routing?hsLang=en) [EVPN / VXLAN Overlay fabrics, MAC/IP routes, multi-homing](https://test4net.com/blog/how-we-test-evpn-vxlan?hsLang=en) [IPsec & IKEv2 Tunnel setup, rekeying and throughput](https://test4net.com/blog/how-we-test-ipsec-and-ikev2?hsLang=en) [TLS / HTTPS Handshakes, cipher suites and inspection](https://test4net.com/blog/how-we-test-tls-and-https?hsLang=en) [RoCEv2 Lossless Ethernet, PFC and ECN for AI fabrics](https://test4net.com/blog/how-we-test-rocev2?hsLang=en) [Wi-Fi 6 / 6E / 7 802.11ax/be, OFDMA, MLO and roaming](https://test4net.com/blog/how-we-test-wi-fi-6-6e-7?hsLang=en) [All protocols](https://test4net.com/blog/tag/protocols?hsLang=en) [RFC 2544 Throughput, latency, frame loss and back-to-back](https://test4net.com/methodologies/rfc-2544?hsLang=en) [RFC 2889 LAN switch benchmarking: forwarding, MAC learning, congestion](https://test4net.com/methodologies/rfc-2889?hsLang=en) [RFC 9411 / RFC 3511 Firewall and NGFW performance benchmarking](https://test4net.com/methodologies/rfc-9411-rfc-3511?hsLang=en) [RFC 6349 TCP throughput and buffer delay testing](https://test4net.com/methodologies/rfc-6349?hsLang=en) [RFC 5180 IPv6 benchmarking methodology](https://test4net.com/methodologies/rfc-5180?hsLang=en) [ITU-T Y.1564 Ethernet service activation: CIR, EIR, KPIs per service](https://test4net.com/methodologies/y-1564?hsLang=en) [ITU-T Y.1731 Ethernet OAM: delay, jitter, loss and SLA monitoring](https://test4net.com/methodologies/y-1731?hsLang=en) [TR-398 Wi-Fi in-premises performance test plan](https://test4net.com/methodologies/tr-398?hsLang=en) [All methodologies](https://test4net.com/methodologies?hsLang=en) Read [Case studies, test insights and lab notes Blog](https://test4net.com/blog?hsLang=en) [What is changing in network testing and infrastructure Industry News](https://test4net.com/news?hsLang=en) [How the lab, sessions and reports work FAQ](https://test4net.com/faq?hsLang=en) [Network testing terms in plain words Glossary](https://test4net.com/glossary?hsLang=en) [About Us Independent lab in Armenia, team and history](https://test4net.com/about?hsLang=en) [Why TEST4NET What you get that vendor slides never show](https://test4net.com/why-test4net?hsLang=en) [Lab & Certifications Bench capacity, methods and the standards we test against](https://test4net.com/lab?hsLang=en) [Partners Test tool vendors and IT partners we work with](https://test4net.com/partners?hsLang=en) [Contacts Talk to an engineer, not a sales bot](https://test4net.com/contacts?hsLang=en) [Support portal](https://test4net.com/support?hsLang=en) - Services What we test [Load & Performance Testing](https://test4net.com/services/load-performance-testing?hsLang=en) [Functional & Conformance Testing](https://test4net.com/services/functional-conformance-testing?hsLang=en) [Interoperability Testing](https://test4net.com/services/interoperability-testing?hsLang=en) [Security & Resilience Testing](https://test4net.com/services/security-resilience-testing?hsLang=en) [Test Plan & Methodology Design](https://test4net.com/services/test-plan-design?hsLang=en) [Test Automation & CI/CD](https://test4net.com/services/test-automation?hsLang=en) [Training Programs](https://test4net.com/services/training-programs?hsLang=en) [Equipment Repair](https://test4net.com/services/equipment-repair?hsLang=en) [All services](https://test4net.com/services?hsLang=en) By technology [Routing & Switching](https://test4net.com/solutions/routing-switching?hsLang=en) [Firewalls & NGFW](https://test4net.com/solutions/firewalls-ngfw?hsLang=en) [SD-WAN & WAN](https://test4net.com/solutions/sd-wan?hsLang=en) [Cloud & NFV](https://test4net.com/solutions/cloud-nfv?hsLang=en) [5G & Mobile Core](https://test4net.com/solutions/5g-mobile-core?hsLang=en) [Wi-Fi](https://test4net.com/solutions/wi-fi?hsLang=en) [Storage & Infrastructure](https://test4net.com/solutions/storage?hsLang=en) [AI / Switching Fabric (RoCEv2)](https://test4net.com/solutions/ai-fabric-rocev2?hsLang=en) [All technologies](https://test4net.com/services#coverage) Industries [Telecom Operators](https://test4net.com/solutions/industries#telecom) [Network & Security Vendors](https://test4net.com/solutions/industries#vendors) [System Integrators](https://test4net.com/solutions/industries#integrators) [Enterprise & Banks](https://test4net.com/solutions/industries#enterprise) [All industries](https://test4net.com/solutions/industries?hsLang=en) [Not sure where to start? Test plan and quote in 1–3 business days](https://test4net.com/contacts?hsLang=en) - Products CloudLAB [How It Works](https://test4net.com/cloudlab#how) [Equipment & Capabilities](https://test4net.com/cloudlab#equipment) [Access Plans](https://test4net.com/cloudlab/plans?hsLang=en) [Hosted DUT Testing](https://test4net.com/cloudlab/hosted-dut?hsLang=en) [Open the CloudLAB portal](https://lab.test4net.com) Our tools [Traffic Generator](https://test4net.com/products/traffic-generator?hsLang=en) [WANemu](https://test4net.com/products/wanemu?hsLang=en) [Book a demo](https://test4net.com/contacts?hsLang=en) [New: our own test tools Our own tools, in beta this autumn](https://test4net.com/products#lead-form) - Resources Read [Blog](https://test4net.com/blog?hsLang=en) [Industry News](https://test4net.com/news?hsLang=en) [FAQ](https://test4net.com/faq?hsLang=en) [Glossary](https://test4net.com/glossary?hsLang=en) [All resources](https://test4net.com/resources?hsLang=en) Technologies / Protocols [BGP](https://test4net.com/blog/how-we-test-bgp?hsLang=en) [OSPF & IS-IS](https://test4net.com/blog/how-we-test-ospf-is-is?hsLang=en) [MPLS & SR](https://test4net.com/blog/how-we-test-mpls-and-segment-routing?hsLang=en) [EVPN / VXLAN](https://test4net.com/blog/how-we-test-evpn-vxlan?hsLang=en) [IPsec & IKEv2](https://test4net.com/blog/how-we-test-ipsec-and-ikev2?hsLang=en) [TLS / HTTPS](https://test4net.com/blog/how-we-test-tls-and-https?hsLang=en) [RoCEv2](https://test4net.com/blog/how-we-test-rocev2?hsLang=en) [Wi-Fi 6 / 6E / 7](https://test4net.com/blog/how-we-test-wi-fi-6-6e-7?hsLang=en) [All protocols](https://test4net.com/blog/tag/protocols?hsLang=en) Methodologies [RFC 2544](https://test4net.com/methodologies/rfc-2544?hsLang=en) [RFC 2889](https://test4net.com/methodologies/rfc-2889?hsLang=en) [RFC 9411 / RFC 3511](https://test4net.com/methodologies/rfc-9411-rfc-3511?hsLang=en) [RFC 6349](https://test4net.com/methodologies/rfc-6349?hsLang=en) [RFC 5180](https://test4net.com/methodologies/rfc-5180?hsLang=en) [ITU-T Y.1564](https://test4net.com/methodologies/y-1564?hsLang=en) [ITU-T Y.1731](https://test4net.com/methodologies/y-1731?hsLang=en) [TR-398](https://test4net.com/methodologies/tr-398?hsLang=en) [All methodologies](https://test4net.com/methodologies?hsLang=en) Read [Blog Case studies, test insights and lab notes](https://test4net.com/blog?hsLang=en) [Industry News What is changing in network testing and infrastructure](https://test4net.com/news?hsLang=en) [FAQ How the lab, sessions and reports work](https://test4net.com/faq?hsLang=en) [Glossary Network testing terms in plain words](https://test4net.com/glossary?hsLang=en) - Company [About Us](https://test4net.com/about?hsLang=en) [Why TEST4NET](https://test4net.com/why-test4net?hsLang=en) [Lab & Certifications](https://test4net.com/lab?hsLang=en) [Partners](https://test4net.com/partners?hsLang=en) [Contacts](https://test4net.com/contacts?hsLang=en) [News](https://test4net.com/news?hsLang=en) [Login](https://lab.test4net.com) [Support](https://test4net.com/support?hsLang=en) [All articles](https://test4net.com/blog) [Storage and data center](https://test4net.com/blog/tag/storage-and-data-center) # How we test backup and replication over WAN: the window and RPO ![](https://test4net.com/hubfs/IMG_0070.jpg) [Alexander Zemskov](https://test4net.com/blog/author/az) October 30, 2026 4 min read [English](https://test4net.com/blog/how-we-test-backup-and-replication-over-wan) [Русский](https://test4net.com/ru/blog/how-we-test-backup-and-replication-over-wan) [Հայերեն](https://test4net.com/hy/blog/how-we-test-backup-and-replication-over-wan) ![How we test backup and replication over WAN: the window and RPO](https://test4net.com/hs-fs/hubfs/blog-covers/how-we-test-backup-and-replication-over-wan.png?width=1600&height=900&name=how-we-test-backup-and-replication-over-wan.png) In this article The sizing sheet divides the data by the link: 20 TB over a 10G WAN is 4.4 hours, the window from 22:00 to 07:00 is 9, so the margin looks double. Over 30 ms of RTT with real provider loss, the backup product opens a few streams on its defaults, each held back by its TCP window, and in a typical project the same 20 TB took 13 hours. We measure backup and replication over your WAN profile: whether the job ends before the morning, how many minutes the replica lags, and how long a restore takes. ## The bench Your WAN goes onto the bench as a profile: delay, jitter, loss and a bandwidth cap with a queue, per direction, from the library or replayed from measurements of your own link. Our own emulator, [WANemu](https://test4net.com/products/wanemu?hsLang=en), in beta on the 1G and 10G links of the bench, applies it, and the report lists the applied and the measured values side by side. On one side sit the source hosts with a sample set built to your profile: file sizes, daily change rate, compressibility. The backup or replication product and its agents run on the bench. The target is a repository in the rack, software-defined storage on bench hosts, or your system over a dedicated link. Generator ports put the application mix on the same WAN link. The sample set is timed and the result extrapolated to your 10 to 200 TB. ## What we check - Throughput per stream at your RTT and loss, and the stream count where one more stops helping - Full and incremental jobs, timed to the last byte committed at the target, against your deadline - Dedup and compression: bytes on the wire against bytes protected for your data, and the proxy CPU - Replication lag in minutes at the night and the peak change rate, and the time to drain it: your real RPO - A job started at peak: its throughput, and the latency and loss the users get meanwhile - WAN failover mid-job: whether the job resumes, retries from a checkpoint or starts over - Restore of a sample set over the WAN, timed to the first usable file and to the last, extrapolated to your recovery set The [storage page](https://test4net.com/solutions/storage?hsLang=en) lists backup over a WAN among 5 device classes. Why one TCP stream stalls over a long delay is in [How we test TCP throughput](https://test4net.com/blog/how-we-test-tcp-throughput?hsLang=en); the network between the hosts and the array has [its own post](https://test4net.com/blog/how-we-test-storage-networks?hsLang=en). ## What usually breaks Too few streams. In the project from the first paragraph the product opened 4 streams, a default chosen for a LAN. Throughput grew with the stream count up to 8 and flattened: the dedup proxy sat at 100 % CPU. With 2 more vCPUs it kept growing to 12 streams, and the same 20 TB crossed in 8.6 hours, inside the window. The link stayed the same. An RPO that holds only at night. Asynchronous replication runs 1 to 2 minutes behind while the users sleep. At the morning peak the application writes more and the same link carries the users, and in a typical project the lag reached 35 minutes against an RPO of 15, then took 3 hours to drain. A dashboard with the daily average lag showed a healthy number all along. A failover the replication does not survive. The primary WAN link goes down, and routing moves the traffic to the second one in 40 seconds. The replication session has a 30-second timeout: it drops and starts a full resync of a 2 TB volume over the slower link. The backup job on the same failover resumes from its checkpoint. Both are product settings, and the bench shows which one you have before a real outage does. ## What is in the report The window per job type against your deadline, with the throughput curve and the stream count. Throughput per stream count for each WAN profile. Bytes on the wire against bytes protected, and the proxy CPU. Replication lag over the day: the peak, the drain time, your RPO line. Restore time of the sample set, extrapolated to the full set. Every failover with the gap and what the job did. For every run: the WAN profile applied and measured, the product settings, host counters. After a product upgrade or a WAN change, a rerun and the diff against this report take 3 business days. ## Where to start Send us the data set size, the WAN between the sites and the window the job has to fit. We answer with a draft test plan: the items, the bench layout and the dates. The report is yours to keep and to show to the vendor. [Write to us](https://test4net.com/contacts?hsLang=en) or look at [what else the bench does](https://test4net.com/services?hsLang=en). Share Pass it on to someone who runs a network Independent lab data is most useful in the hands of the people who make the call. Send this piece to a colleague. [LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Ftest4net.com%2Fblog%2Fhow-we-test-backup-and-replication-over-wan) [X](https://twitter.com/intent/tweet?url=https%3A%2F%2Ftest4net.com%2Fblog%2Fhow-we-test-backup-and-replication-over-wan&text=How+we+test+backup+and+replication+over+WAN%3A+the+window+and+RPO) [Telegram](https://t.me/share/url?url=https%3A%2F%2Ftest4net.com%2Fblog%2Fhow-we-test-backup-and-replication-over-wan&text=How+we+test+backup+and+replication+over+WAN%3A+the+window+and+RPO) [WhatsApp](https://wa.me/?text=How+we+test+backup+and+replication+over+WAN%3A+the+window+and+RPO%20https%3A%2F%2Ftest4net.com%2Fblog%2Fhow-we-test-backup-and-replication-over-wan) Copy link More apps ![](https://test4net.com/hubfs/IMG_0070.jpg) Written by ### [Alexander Zemskov](https://test4net.com/blog/author/az) Alexander Zemskov leads network and security testing at TEST4NET, an independent, vendor-neutral testing lab in Yerevan, Armenia. With 19+ years in performance and load testing on IXIA, Spirent, Keysight, Xena and Xinertel platforms, he runs NGFW, WAF, IPS, DLP and SASE evaluations for telecom operators, banks and system integrators. [LinkedIn](https://www.linkedin.com/in/azemskov/) [Website](https://test4net.com/?hsLang=en) [Previous article How we test S3 object storage: 1 kB to 128 MB and a lost node](https://test4net.com/blog/how-we-test-s3-object-storage?hsLang=en) [Next article How we test NAS over NFS and SMB: metadata calls and failover](https://test4net.com/blog/how-we-test-nas-file-shares?hsLang=en) In this article On the bench ### Have a device to put through this? Send us the shortlist and the KPIs that decide it. We will come back with a scoped test plan, a timeline and a fixed price. [Talk to a test engineer](https://test4net.com/contacts?hsLang=en) Blog ## Keep reading [![How we test hyperconverged clusters: a lost node and VM p99](https://test4net.com/hs-fs/hubfs/blog-covers/how-we-test-hyperconverged-clusters.png?width=880&height=550&name=how-we-test-hyperconverged-clusters.png)](https://test4net.com/blog/how-we-test-hyperconverged-clusters?hsLang=en) [Storage and data center](https://test4net.com/blog/tag/storage-and-data-center) ### [How we test hyperconverged clusters: a lost node and VM p99](https://test4net.com/blog/how-we-test-hyperconverged-clusters?hsLang=en) An HCI sizing sheet answers one question: how many VMs fit on 4 nodes with one node in reserve. It is calculated on a healthy cluster. A buyer reads "N+1" and expects a l… ![](https://test4net.com/hs-fs/hubfs/IMG_0070.jpg?width=22&height=22&name=IMG_0070.jpg) Alexander Zemskov Oct 30, 2026 · 5 min read [![How we test NAS over NFS and SMB: metadata calls and failover](https://test4net.com/hs-fs/hubfs/blog-covers/how-we-test-nas-file-shares.png?width=880&height=550&name=how-we-test-nas-file-shares.png)](https://test4net.com/blog/how-we-test-nas-file-shares?hsLang=en) [Storage and data center](https://test4net.com/blog/tag/storage-and-data-center) ### [How we test NAS over NFS and SMB: metadata calls and failover](https://test4net.com/blog/how-we-test-nas-file-shares?hsLang=en) A NAS datasheet gives one figure: sequential read in GB/s, taken with large files and a few clients. On a home-directory share or a build farm, hundreds of clients create… ![](https://test4net.com/hs-fs/hubfs/IMG_0070.jpg?width=22&height=22&name=IMG_0070.jpg) Alexander Zemskov Oct 30, 2026 · 4 min read [![How we test S3 object storage: 1 kB to 128 MB and a lost node](https://test4net.com/hs-fs/hubfs/blog-covers/how-we-test-s3-object-storage.png?width=880&height=550&name=how-we-test-s3-object-storage.png)](https://test4net.com/blog/how-we-test-s3-object-storage?hsLang=en) [Storage and data center](https://test4net.com/blog/tag/storage-and-data-center) ### [How we test S3 object storage: 1 kB to 128 MB and a lost node](https://test4net.com/blog/how-we-test-s3-object-storage?hsLang=en) An S3 cluster datasheet gives one figure in GB/s. It was taken with large objects, a few clients and every node healthy. Your application writes, for example, 16 kB thumb… ![](https://test4net.com/hs-fs/hubfs/IMG_0070.jpg?width=22&height=22&name=IMG_0070.jpg) Alexander Zemskov Oct 30, 2026 · 4 min read [![TEST4NET LLC](https://test4net.com/hubfs/test4net-logo-fixed.svg)](https://test4net.com?hsLang=en) Independent testing and validation for telecom, information security and cloud infrastructure – real insights, not assumptions [mailto:sales@test4net.com](mailto:sales@test4net.com) #### Navigate - [Home](https://test4net.com/?hsLang=en) - [Why TEST4NET](https://test4net.com/why-test4net?hsLang=en) - [About us](https://test4net.com/about?hsLang=en) - [Contact](https://test4net.com/contacts?hsLang=en) - [Blog](https://test4net.com/blog?hsLang=en) - [Industry News](https://test4net.com/news?hsLang=en) #### Get in touch Sales [sales@test4net.com](mailto:sales@test4net.com) Support [support.test4net.com](https://support.test4net.com) © 2026 TEST4NET LLC. All rights reserved. [Privacy Policy](https://test4net.com/privacy-policy?hsLang=en) [Legal](https://test4net.com/legal?hsLang=en) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Alexander Zemskov", "url" : "https://test4net.com/blog/author/az" }, "dateModified" : "2026-10-29T21:19:16.872Z", "datePublished" : "2026-10-29T21:19:16.000Z", "headline" : "How we test backup and replication over WAN | TEST4NET", "image" : [ "https://test4net.com/hubfs/blog-covers/how-we-test-backup-and-replication-over-wan.png" ], "mainEntityOfPage" : { "@id" : "https://test4net.com/blog/how-we-test-backup-and-replication-over-wan", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://test4net.com/hubfs/test4net-logo-fixed.svg" }, "name" : "TEST4NET LLC" } } ``` ```json { "@context" : "https://schema.org", "@id" : "https://test4net.com/#organization", "@type" : "Organization", "address" : { "@type" : "PostalAddress", "addressCountry" : "AM", "addressLocality" : "Yerevan", "postalCode" : "0033", "streetAddress" : "3 Hakob Hakobyan Street (Mergelyan Hub)" }, "alternateName" : "TEST4NET", "contactPoint" : { "@type" : "ContactPoint", "availableLanguage" : [ "en", "ru", "hy" ], "contactType" : "sales", "email" : "sales@test4net.com", "telephone" : "+374-60-88-88-99" }, "description" : "Independent, vendor-neutral lab for testing network and cybersecurity products — NGFW, WAF, IPS, DLP and SASE — and an authorized distributor of test, measurement and network infrastructure solutions.", "email" : "sales@test4net.com", "foundingDate" : "2024", "image" : "https://test4net.com/hubfs/og-t4n.png", "logo" : "https://test4net.com/hubfs/test4net-logo-fixed-2.svg", "name" : "TEST4NET LLC", "sameAs" : [ "https://www.linkedin.com/company/test4net/", "https://t.me/TEST4NET", "https://www.facebook.com/people/Test4net-LLC/61591470856077/" ], "telephone" : "+374-60-88-88-99", "url" : "https://test4net.com/" } ``` ```json { "@context" : "https://schema.org", "@id" : "https://test4net.com/#website", "@type" : "WebSite", "inLanguage" : "en", "name" : "TEST4NET", "potentialAction" : { "@type" : "SearchAction", "query-input" : "required name=search_term_string", "target" : { "@type" : "EntryPoint", "urlTemplate" : "https://test4net.com/hs-search-results?term={search_term_string}" } }, "publisher" : { "@id" : "https://test4net.com/#organization" }, "url" : "https://test4net.com/" } ``` ```json { "@context" : "https://schema.org", "@type" : "BreadcrumbList", "itemListElement" : [ { "@type" : "ListItem", "item" : "https://test4net.com/", "name" : "TEST4NET", "position" : 1 }, { "@type" : "ListItem", "item" : "https://test4net.com/blog", "name" : "Blog", "position" : 2 }, { "@type" : "ListItem", "item" : "https://test4net.com/blog/how-we-test-backup-and-replication-over-wan", "name" : "How we test backup and replication over WAN: the window and RPO", "position" : 3 } ] } ```