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CompTIA Network+ N10-007 Cert Guide
Chapter 9 Network Optimization
1) Be careful not to confuse availability with reliability. An available network, for example, does
not drop many packets. However, a reliable network is up and operational.
2) The availability of a network increases as the ________ of the network devices decreases and
as ________ increases. Therefore, selecting reliable networking devices that are quick to repair
is crucial to a high-availability design.
A) MTTR, MTRS
B) MTBF, MTTR
C) MTRS, MTTR
D) MTTR, MTBF
3) Which term is best described by the following definition?
Both NICs are active at the same time, and they each have their own MAC address.
A) Active-live
B) Active-standby
C) Active-active
D) Active-passive
4) Which of the following is a Cisco proprietary first-hop redundancy protocol?
A) HSRP
B) CARP
C) LACP
D) Cisco-RP
5) Quality of service (QoS) is a technology that allows a network design to strategically optimize
network performance for select traffic types. This means, using QoS on a network device can
identify which traffic types need to be sent first, how much bandwidth to allocate to various
traffic types, which traffic types should be dropped first in the event of congestion, and how to
make the most efficient use of the relatively limited bandwidth of an IP WAN.
6) What is the effective bandwidth in the WAN following diagram?
A) 512 kbps
B) 1.544 Mbps
C) 10 Mbps
D) 256 kbps
7) Which is not a category of QoS mechanisms?
A) Integrated services (IntServ)
B) Best effort
C) Mechanical-services
D) Differentiated services
8) Marking alters bits within a frame, cell, or packet to indicate how the network should treat that
traffic. Marking alone does not change how the network treats a packet.
9) VoIP sends packets using Real-time Transport Protocol (RTP), which is a ________ protocol.
A) Layer 4
B) Layer 2
C) Layer 3
D) Layer 1
10) In network HA measurement, what is the meaning of five nines?
A) Five out of every nine networks fail.
B) Five out of every user's computers is unavailable for access.
C) The network should experience 99.999 percent uptime.
D) Five out of every nine network administrators are always available to take care of their
network problem.
11) Which of the following are the two modes of network interface card (NIC) redundancy?
A) Active-active
B) Hot Standby Router Protocol (HSRP)
C) Active-standby
D) Common Address Redundancy Protocol (CARP)
E) Collective standby
12) Which QoS quality issue is defined as an uneven arrival of packets into a receiver?
A) Jitter
B) Delay
C) Sway
D) Flaps
13) Which QoS quality issue is defined as the time required for a packet to travel from its source
to its destination?
A) Jitter
B) Delay
C) Sway
D) Flaps
14) What is the maximum amount of one-way delay that is acceptable for a video conference?
A) 200 ms
B) 100 ms
C) 150 ms
D) 400 ms
15) Which QoS mechanism uses classification and marking to determine and indicate the priority
of a packet?
A) IntServ
B) PriServ
C) TurServ
D) DiffServ
16) Which byte inside the IPv4 header is used for DiffServ markings?
A) ToS
B) CoS
C) Options
D) DSCP
17) Which option is not one of the available congestion management queuing algorithms?
A) WRR
B) LIFO
C) WFQ
D) LLQ
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18) ________ buffers (and therefore delays) traffic exceeding a configured rate.
A) Congestion
B) Policing
C) Shaping
D) Prevention
19) The average amount of bandwidth that is expected and ordered on a WAN link is referred to
as the ________.
A) PBR
B) AVR
C) PIR
D) CIR
20) What is the name of the feature that can be enabled on slower-speed WAN links to prevent a
large data transfer from affecting the performance of smaller interactive sessions?
A) LFI
B) UDLD
C) PIR
D) CIR
21) What is the agreement that exists between a service provider and a client regarding the
quality, availability, and specific responsibilities agreed on between both parties?
A) SLA
8
B) NDA
C) MTBF
D) SPOF
22) What form of hardware redundancy consists of tightly connected computers working
together and acting as a single system?
A) EtherChannel group
B) Virtual router
C) Cluster
D) RAID
23) Besides designing redundancy into our networks, we can also create redundant sites located
in geographically distant areas. Match the common types of backup sites to their definition.
Backup Site
Definition
Hot site
Recovery possible fairly quickly, but not equal to original site
Cold site
Minimal downtime with nearly identical service level
Warm site
Recovery possible, but difficult and time consuming
24) Which of the three categories of QoS issues stems from the uneven arrival of one packet
from another?
A) Delay
B) Jitter
C) Drops
D) Tail drop
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Copyright © 2018 Pearson Education, Inc.
Chapter: Chapter 9: Network Optimization
Remediation: Introduction to QoS
25) Of the three categories of QoS mechanisms, which does not truly provide QoS and uses a
FIFO queuing strategy?
A) Unreliable
B) Integrated services
C) Differentiated services
D) Best effort
26) The bundling of Layer 2 links between switches into a single logical link is commonly
accomplished by LACP. What other term is used for combining links in this manner?
A) Spanning tree
B) HSRP
C) Port aggregation
D) Root guard
