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What you need to know about DNS

DNS (Domain Name System) is an essential system of Internet infrastructure that translates human-readable domain names (like www.example.com) into computer-understandable IP addresses (like 192.0.2.1). This conversion allows users to easily access websites and online services without having to memorize complex IP addresses. DNS functions as a decentralized global directory, organized in a hierarchy of servers. When a user enters a domain name in a browser, a DNS query is sent to look up the associated IP address. DNS servers resolve these queries by interrogating different levels, from root servers to authoritative name servers. DNS is also used for other network services, such as emails, through MX records, or to secure connections via DNSSEC records. It is a crucial component for Internet browsing, ensuring resource accessibility while maintaining high performance and reliable domain name management.

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Permanent

Job VacancyAdministrateur système et réseaux H/F

Les Filles et les Garçons de la Tech
Published on
Active Directory
Aruba
Cisco

40k-51k €
Lavaur, Occitania
Dans le cadre du renforcement de ses équipes informatiques, le client (secteur santé) recherche un Administrateur Systèmes & Réseaux polyvalent pour intervenir sur site. La mission consiste à assurer l'exploitation, l'administration, le maintien en conditions opérationnelles et l'évolution des infrastructures IT. Le consultant travaillera au cœur du système d'information et participera aux activités de support de niveau avancé, d'administration, de sécurisation et d'optimisation des plateformes techniques. Missions : Administrer et maintenir les infrastructures réseaux Cisco et Aruba. Superviser les équipements réseau, la connectivité et les performances. Assurer la gestion des VLAN, routage, commutation, Wi-Fi et règles d'accès. Administrer les plateformes de virtualisation VMware et Proxmox. Déployer, maintenir et optimiser les machines virtuelles. Administrer les serveurs Microsoft Windows. Gérer Active Directory, DNS, DHCP, GPO et services associés. Participer aux activités de sauvegarde, restauration et continuité de service. Diagnostiquer et résoudre les incidents de niveau 2/3. Produire la documentation technique et mettre à jour les procédures. Participer aux projets d'évolution d'infrastructure et de modernisation. Garantir l'application des bonnes pratiques de sécurité informatique. Assurer le support technique auprès des équipes locales. Environnement technique : Réseau : Cisco, Aruba, switching, VLAN, Wi-Fi, routage, supervision. Virtualisation : VMware vSphere, Proxmox. Systèmes : Windows Server 2016/2019/2022. Services Microsoft : Active Directory, DNS, DHCP, GPO, fichiers et impressions. Sauvegarde et PRA/PCA. Outils de supervision et d'administration. Environnements de production critiques à forte disponibilité Livrables et objectifs de la mission : Maintien d'un haut niveau de disponibilité des infrastructures, réduction des incidents récurrents, documentation à jour, participation aux projets et amélioration continue des performances du SI.
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Contractor
Permanent

Job VacancyIngénieur Poste de Travail Senior (H/F)

RIDCHA DATA
Published on
DHCP (Dynamic Host Configuration Protocol)
DNS
Group Policy Object (GPO)

1 year
40k-45k €
400-510 €
Corbeil-Essonnes, Ile-de-France
ContexteDans le cadre d'un important programme de transformation et d'expansion internationale, nous recherchons un Ingénieur Poste de Travail Senior pour renforcer une équipe Workplace en charge de l'industrialisation et du déploiement des postes de travail sur de nouveaux sites. Le projet couvre l'ouverture de nouveaux établissements, l'extension de sites existants ainsi que l'intégration de sociétés récemment acquises. Vous interviendrez dans un environnement international, avec des enjeux d'harmonisation des infrastructures, de standardisation des postes de travail et d'accompagnement des équipes locales. Vos missionsConcevoir, maintenir et sécuriser les masters de postes de travail. Assurer le packaging et le déploiement des applications via SCCM. Préparer et industrialiser les postes destinés aux nouveaux sites et aux environnements issus d'acquisitions. Piloter les campagnes de migration (systèmes d'exploitation, masters et applications). Administrer l'environnement Active Directory (GPO, gestion des droits, OIAR). Superviser l'expérience utilisateur et la santé du parc informatique via Nexthink et mettre en œuvre les actions de remédiation nécessaires. Assurer le support de niveau 3 sur le périmètre Workplace. Accompagner les équipes locales lors des déploiements et assurer le transfert de compétences. Rédiger la documentation technique (procédures, modes opératoires, spécifications, comptes rendus). Produire un reporting régulier sur l'avancement des activités. Environnement techniqueMicrosoft SCCM (MECM) Masterisation & Packaging applicatif Active Directory GPO OIAR Nexthink PowerShell DNS DHCP LAN / WAN Environnements Microsoft Windows Connaissances appréciées : Infoblox, Palo Alto, Check Point
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Permanent

Job VacancyIT Support Engineer

Nexus Jobs Limited
Published on

£45k-55k
London, England, United Kingdom
IT Support Engineer Our Client is an established bank based in Central London. They are looking to recruit an IT Support Analyst with at least 5 plus years hands-on expertise of working within IT Support and Infrastructure. The following are list of skills required for the position: · Microsoft Windows (all versions) experience to a high level (troubleshoot and effectively resolve issues by research/using knowledge bases in a confident way). · Active Directory to a high level - security groups, administration/deployment, LDAP, ADSI. · Citrix XenApps – Administration, Maintenance and Support of existing Citrix XenApps server farm · Windows Server Environment 2012/2016 - design, deployment, maintenance and support. · VM-Ware virtualisation environments. · Backups (various and ability to use different applications). · Networking - design/troubleshoot/installation (VLAN, routing, switching, TCP/IP and OSI) · Router maintenance - wireless configuration, installation and setups. · PowerShell to a competent level (backup/azure/EMC). · VPN Administration and Deployment. · DNS – administration of DNS internal and external. The salary for this position with be circa £45K - £55K. This is a hybrid position and you will be required to be in the office at least 3 days a week. The position will be a 12 month full time contract – FTC initially. Do send your CV to us in Word format along with your salary and availability.
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Permanent

Job VacancyIT Support Engineer

Nexus Jobs Limited
Published on

£40k-50k
London, England, United Kingdom
IT Support Engineer Our Client is an established bank based in Central London. They are looking to recruit an IT Support Analyst with at least 5 plus years of 1 and 2 level hands-on expertise of working within IT Support and Infrastructure from a banking environment. The following are list of skills required for the position: · Microsoft Windows (all versions) experience to a high level (troubleshoot and effectively resolve issues by research/using knowledge bases in a confident way). · Active Directory to a high level - security groups, administration/deployment, LDAP, ADSI. · Citrix XenApps – Administration, Maintenance and Support of existing Citrix XenApps server farm · Windows Server Environment 2012/2016 - design, deployment, maintenance and support. · VM-Ware virtualisation environments. · Backups (various and ability to use different applications). · Networking - design/troubleshoot/installation (VLAN, routing, switching, TCP/IP and OSI) · Router maintenance - wireless configuration, installation and setups. · PowerShell to a competent level (backup/azure/EMC). · VPN Administration and Deployment. · DNS – administration of DNS internal and external. Experience of supporting Market Data and Bloomberg would be a great plus. The salary for this position with be circa £40K - £50K. This is a hybrid position and you will be required to be in the office at least 3 days a week. The position will be a 12 month full time contract – FTC initially. Do send your CV to us in Word format along with your salary and availability.
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Contract roles and jobs for DNS

System administrator

The Systems Administrator manages and configures DNS servers to ensure correct domain name resolution and service availability.

Systems & Networks Engineer

The Systems & Network Engineer administers and optimizes DNS services in a complex network environment, managing DNS zones, security, and redundancy.

Systems and Networks Manager

The Systems and Network Manager supervises the management of the company’s DNS infrastructure, implementing security and performance strategies for domain name services.

Network Technician

The Network Technician installs and maintains DNS configurations in company networks, ensuring connectivity and rapid domain name resolution.

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