Network layer protocol
Routing protocol
Security
AAA
Firewall
VPN
Quality of Service (QoS)
Network reliability
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SLIP
ISDN (PRI/BRI)
LLC2
SDLC
DLSW-SSP
VLAN
ARP
ARP Proxy
DNS
NAT
IP Filtering
ICMP
IGMP
DHCP client
NHRP
Static routing
Policy-based routing
RIP v1, v2
OSPF v1, v2
BGP-4
DDR
IP Multicasting
DVMRP
PIM-DM/SM
Radius
PAP
CHAP
TACAS+
ACL
NAT
L2TP
GRE
IPSec
FIFO
PQ
CQ
CBWFQ
WFQ
RED
WRED
RTS
RSVP
HSRP
Port backup
9
DI-3660 Router