Network

This service ensures the basic connectivity to the CESNET e-infrastructure at speed of n x 10 Gbps with a transmission speed of 100 Gb/s. The fully-optical backbone network allows for data transmission with a minimum delay and low jitter. Its high reliability is ensured by the combination of backbone infrastructure redundancy and continuous network monitoring. The e-infrastructure provides access to the pan-European network GÉANT and other partner networks (Internet2, ESnet, APAn) which enable the users to operate sophisticated and unique application in the supra-national environment.

CESNET Lambda service represents a set of services based on optical signal transport over fully transparent channels of wavelength multiplex between end nodes (E2E).

CESNET Photonic represents a collection of special advanced services of optical networks which, by their uniqueness and science and research support, significantly differentiate CESNET from commercial providers.

The CESNET NIC authority allocates address resources (IP addresses) to entities connected to the CESNET2 network, ensures communication with Réseaux IP Européens Network Coordination Centre (RIPE NCC) and maintains contact information on allocated networks in the RIPE database up to data.

In the field of DNS, we offer two variants of services: DNS resolving and DNS delegation.

Dedicated end-to-end (E2E) links at link layer (L2) for special applications requiring high throughput and low latency.

The service provides accurate time (in UTC scale) and serves for the synchronization of computer clock. CESNET runs several primary NTP servers (Stratum-1) whose time is synchronized with rubidium clock.

The service ensures the reception of electronic mail messages where the primary server has failed. In case of a short outage of the primary server (up to five days), the backup mail server saves the mail and delivers the messages once the primary server is re-launched.

The service consists in the provision of information about the transmitted IP traffic (IPv4, IPv6). The primary source of such information is the so called NetFlow exported by means of routers or special probes. Traffic data comprise data extracted from TCP/IP protocol headers and additional data created by the in-house developed FTAS system.

The service provides information about the utilisation and state of the network (or other type of) infrastructure or its part in a short-term (hours, days), mid-term and long-term (years) perspective. To enable the users to monitor the level of resource utilisation, the availability of unused capacity, the development of fault or other characteristics and strategically plan further development. The outputs can be adjusted for the purpose of technical or managerial analysis.