PPP (Point-to-Point Protocol)

L2TP (Layer 2 Tunneling Protocol)

IPSec (Internet Protocol Security)

GRE (Generic Routing Encapsulation)

RADIUS (Remote Authentication Dial-In User Service)

TACACS+ (Terminal Access Controller Access-Control System Plus)

NetFlow (Network Traffic Analysis)

ICMPv6 (Internet Control Message Protocol version 6)

LLDP (Link Layer Discovery Protocol)

UPnP (Universal Plug and Play)VLAN (Virtual Local Area Network)

STP (Spanning Tree Protocol)

OSPF (Open Shortest Path First)

BGP (Border Gateway Protocol)

IS-IS (Intermediate System to Intermediate System)

MPLS (Multiprotocol Label Switching)

VRRP (Virtual Router Redundancy Protocol)

HSRP (Hot Standby Router Protocol)

PIM (Protocol Independent Multicast)

IGMP (Internet Group Management Protocol)TCP (Transmission Control Protocol)

UDP (User Datagram Protocol)

IP (Internet Protocol)

ICMP (Internet Control Message Protocol)

HTTP (Hypertext Transfer Protocol)

FTP (File Transfer Protocol)

SSH (Secure Shell)

DNS (Domain Name System)

SMTP (Simple Mail Transfer Protocol)

POP3 (Post Office Protocol version 3)

IMAP (Internet Message Access Protocol)

Telnet (Teletype Network)

SNMP (Simple Network Management Protocol)

DHCP (Dynamic Host Configuration Protocol)

ARP (Address Resolution Protocol)

SSL/TLS (Secure Sockets Layer/Transport Layer Security)

RDP (Remote Desktop Protocol)

SIP (Session Initiation Protocol)

RTP (Real-time Transport Protocol)

NTP (Network Time Protocol)