6.1 Infrastructure security 6.1.a Device hardening techniques and control plane protection methods 6.1.b Management plane protection techniques 6.1.b.i CPU 6.1.b.ii Memory thresholding 6.1.b.iii Securing device access 6.1.c Data plane protection techniques 6.1.c.i QoS 6.1.d Policy plane signaling 6.1.d.i RADIUS 6.1.d.ii TACACS+ 6.1.D.III PXGRID 6.1.D.IV SXP 6.1.e第2层安全技术6.1.E.I动态ARP检查6.1.E.I.II IPDT 6.1.E.III STP SETS SECTION 6.1.E.IV端口端口安全6.1.E.E.E.E.V DHCP DHCP Snoop Snoop 6.1.e.vi ipv6-Speci.E.E.V6-Specifififififififififibs.6.1。 6.1.e.viii MACsec (802.1AE) 6.1.e.ix MACsec in WAN environments 6.1.f Wireless security technologies 6.1.f.i WPA 6.1.f.ii WPA2 6.1.f.iii WPA3 6.1.f.iv TKIP 6.1.f.v AES 6.1.f.vi OWE