Cisco Designing Cisco Network Service Architectures v3.0 Set 9

first hop redundancy protocol ✘ Layer 2 links between access switches ✘ single uplinks between access and distribution switches ✘ VLANs that span access switches ✔ Layer 3 links between distribution switches ✔

N_Port to N_Port connections use logical node connection points. ✘ Flow control is only provided by QoS ✘ It must be implemented in an arbitrated loop. ✘ Communication methods are similar to those of an Ethernet bus. ✔

RPVST+ ✘ MEC ✘ VSS ✘ STP ✔

Automatic unicast flooding is suppressed over the OTV link. ✘ BPDUs are allowed to traverse the OTV link. ✘ Control plane traffic is prevented from traversing the OTV link ✘ Data plane traffic is prevented from traversing the OTV link. ✔

GLBP ✘ HSRP ✘ VRRP ✘ VSS ✔

guest VM high availability ✘ converged LAN and SAN infrastructure ✘ host based etherchannel ✘ built-in hypervisor ✔

The potential size of the IPv6 address blocks suggests that address summarization favors IPv6 over IPv4. ✘ Role based addressing using wildcard masks to match multiple subnets is suitable for IPv4, but unsuitable for IPv6. ✘ In order to summarize, the number of subnets in the IPv4 address block should be a power of 2 while the number of subnets in the IPv6 address block should bea power of 64. ✘ WAN link addressing best supports summarization with a /31 subnet for IPv4 and a /126 for IPv6. ✔

FRTS ✘ LLQ ✘ CBWFQ ✘ WFQ ✔

All available uplinks bandwidth is used. ✘ FHRP is not required ✘ A single IP is used for management of both devices ✘ The two switches form a single control plane ✔

connect to other data centers ✘ connect to the access layer ✘ connect to the end users ✘ connect to mobile devices ✔