Last Mile

The last mile (or first mile) is the final segment of a telecom network connecting the operator's local exchange or aggregation point to the customer premises. Technologies in use include FTTH/FTTP, copper xDSL, DOCSIS over coaxial, fixed wireless access (4G/5G FWA), and satellite. Last-mile economics dominate broadband deployment decisions.

Categories: Radio Access NetworkInternet and Routing

Last Mile in context

The radio access network is where mobile devices attach to the operator's infrastructure. Attacks in this layer include IMSI catching, rogue base stations and downgrade attacks; defenses rest on mutual authentication, integrity-protected signaling and Open RAN supply-chain hygiene.

Telecom networks depend on Internet-style routing (BGP, DNS, MPLS) for interconnect. Route hijacks and DNS abuse can degrade or intercept signaling, which is why RPKI and DNSSEC are now standard hardening for carrier networks.

To place Last Mile in the wider telecom-security picture, review A5/3, Broadband, BSS, CDMA, Core Network and CVE — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

More from the TelcoSec Glossary

Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.