2.3.a Implement and troubleshoot HDLC

i believe the blueprint for the new v5 is superior to v4… look at l2 WAN below…

Layer 2 WAN circuit technologies
2.3.a Implement and troubleshoot HDLC
2.3.b Implement and troubleshoot PPP
2.3.b (i) Authentication (PAP, CHAP)
2.3.b (ii) PPPoE
2.3.b (iii) MLPPP
2.3.c Describe WAN rate-based ethernet circuits
2.3.c (i) Metro and WAN Ethernet topologies
2.3.c (ii) Use of rate-limited WAN ethernet services

that’s it…

check out the vpn section:

4.0 VPN Technologies
4.1 Tunneling
4.1.a Implement and troubleshoot MPLS operations
4.1.a (i) Label stack, LSR, LSP
4.1.a (ii) LDP
4.1.a (iii) MPLS ping, MPLS traceroute
4.1.b Implement and troubleshoot basic MPLS L3VPN
4.1.b (i) L3VPN, CE, PE, P
4.1.b (ii) Extranet (route leaking)
4.1.c Implement and troubleshoot encapsulation
4.1.c (i) GRE
4.1.c (ii) Dynamic GRE
4.1.c (iii) LISP encapsulation principles supporting EIGRP OTP

4.1.d Implement and troubleshoot DMVPN (single hub)
4.1.d (i)NHRP
4.1.d (ii) DMVPN with IPsec using preshared key
4.1.d (iii) QoS profile
4.1.d (iv) Pre-classify
4.1.e Describe IPv6 tunneling techniques
4.1.e (i) 6in4, 6to4
4.1.e (ii) ISATAP
4.1.e (iii) 6RD
4.1.e (iv) 6PE/6VPE
4.1.g Describe basic layer 2 VPN —wireline

4.1.g (i) L2TPv3 general principals
4.1.g (ii) ATOM general principals
4.1.h Describe basic L2VPN — LAN services
4.1.h (i) MPLS-VPLS general principals
4.1.h (ii) OTV general principals

4.2 Encryption
4.2.a Implement and troubleshoot IPsec with preshared key
4.2.a (i) IPv4 site to IPv4 site
4.2.a (ii) IPv6 in IPv4 tunnels
4.2.a (iii) Virtual tunneling Interface (VTI)
4.2.b Describe GET VPN