单项选择题

When is a first-hop redundancy protocol needed in the distribution layer？（）

A. when the design implements Layer 2 between the access arid distribution blocks
B. when multiple vendor devices need to be supported
C. when preempt tuning of the default gateway is needed
D. when a robust method of backing up the default gateway is needed
E. when the design implements Layer 2 between the access switch and the distribution blocks
F. when the design implements Layer 2 between the access and distribution blocks

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多项选择题

From a design perspective which two of the following OHPF Statements are most relevant？（）

A. OSPF stub areas can be thought of as a simple form of summarization
B. OSPF cannot filter intra area routes
C. An ARR ran only exist in two areas - the backbone and one adjacent area
D. Performance issues in the Backbone area can be offset by allowing some traffic to transit anon-backbone area
E. the size of an area （the LSDB） will be constrained by the size of the IP MTU

单项选择题

When an Enterprise Campus network designer is addressing the merger of two companies with different IGPs， which of the following is considering a super routing design？（）

A. Eliminate the management and support for redistribution by choosing and cutting over to asingle IGP at the time of merger
B. Maintain distinct pockets across a moving boundary of routing protocols， redistributing betweenthem
C. Manipulate the administrative distance of the different IGPs to be equal throughout the network
D. Leave the IGPs independent without redistribution wherever communication between companyentities is not required

单项选择题

In base e-Commerce module designs， where should firewall perimeters be placed？（）

A. core layer
B. Internet boundary
C. aggregation layer
D. aggregation and core layers
E. access and aggregation layers