![](/images/new-backgrounds/1263750/263750655x1.webp)
Relative storage humidity: 20 to 80% noncondensing
Software and protocols
Software media: Software preloaded on internal flash memory; field upgrades done via download to internal flash memory via TFTP or web upload. (does not apply to 3342/3352)
Routing: TCP/IP Internet Protocol Suite, RIP
WAN support: PPPoA, PPPoE, DHCP, static IP address
Security: PAP, CHAP, UI password security, IPsec, SSL certificate
Management/configuration methods: HTTP (Web server), Telnet, SNMP,
Diagnostics: Ping, event logging, routing table displays, statistics counters,