Explanation
The three-tier hierarchical
design maximizes performance, network availability, and the ability to
scale the network design. Most small enterprise campus’ do not grow significantly
larger over
time, and most small enterprise campus are small enough to be well served by a two-tier
hierarchical design, where the core and distribution layers are collapsed into one layer. The
primary motivation for the collapsed core design is reducing network cost, while
maintaining
most of the benefits of the three-tier hierarchical model.
Reference:
https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Small_Enterprise_Design
_Profile/SEDP/chap2.html
Question 98
Refer to the exhibit.
Routers R1 and R2 have been configured with their respective LAN interfaces. The two circuits
are operational and reachable across WAN. Which command set establishes failover redundancy
if the primary circuit goes down?
A. R1(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.6 2
R2(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.5 2
B. R1(config)#ip route 10.10.13.10 255.255.255.255 10.10.10.6
R2(config)#ip route 192.166.0.100 255.255.255.255 10.10.10.5
C. R1(config)#ip route 10.10.13.10 255.255.255.255 10.10.10.2
R2(config)#ip route 192.168.0.100 255.255.255.255 10.10.10.1
D. R1(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.6
R2(config)#ip route 0.0.0.0 0.0.0.0 10.10.10.5
Answer:
A
Question 99
Drag and drop the traffic types from the left onto the QoS delivery mechanisms on the right.
Answer:
+ best effort: standard Web
browsing traffic
+ priority queue: VoIP traffic
+ policing: video traffic
+ shaping: database synchronization traffic
Explanation
+ best effort: standard Web browsing traffic (Regular Web traffic is considered a low priority,
TCP or UDP)
+ priority queue: VoIP traffic (VoIP is time sensitive and it uses UDP to speed up the delivery of
packets. But it should have priority to guarantee quality)
+ policing: video traffic (Video stream is time sensitive and it uses UDP to
speed up the delivery
of packets. But the bandwidth for video is much higher than voice so we can drop some packets
if there is not enough bandwidth. The quality is still acceptable for most viewers)
+ shaping: database synchronization traffic (DB communications use TCP to warranties the
delivery of the packets, queuing the packets don’t affect the transmission)
Question 100
What is a function performed by a web server?
A. provide an application that
is transmitted over HTTP
B. send and retrieve email from client devices
C. securely store files for FTP access
D. authenticate and authorize a user’s
identity
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