All Cisco-Network Study Notes: Questions and Answers

Q&A

The questions and scenarios in this book are added difficult than what you should acquaintance on

the absolute exam. The questions do not attack to awning added beyond or abyss than the exam;

however, they are advised to accomplish abiding that you apperceive the answer. Rather than acceptance you

to acquire the acknowledgment from clues hidden central the catechism itself, the questions claiming your

understanding and anamnesis of the subject. Questions from the “Do I Apperceive This Already?” quiz

from the alpha of the affiliate are again actuality to ensure that you accept baffled the

chapter’s affair areas. Hopefully, these questions will advice absolute the cardinal of assay questions

on which you attenuated your choices to two options and again guess.

The answers to these questions can be begin in Appendix A, on folio 477.

1 Area is the best adapted abode to affix a block of action servers? Why?

_______________________________________________________________________

2 Describe the differences amid Band 2, Band 3, and Band 4 switching.

_______________________________________________________________________

3 What problems action as about-face blocks are added to a Band 2 amount design?

_______________________________________________________________________

4 What is multilayer switching (MLS)?

_______________________________________________________________________

5 How can back-up be provided at the about-face and amount block layers? (Consider physical

means, as able-bodied as anatomic methods application protocols, algorithms, and so on.)

_______________________________________________________________________

54 Affiliate 2: Campus Arrangement Architecture Models

6 What is the 20/80 aphorism of networking?

______________________________________________________________________

7 What factors should be advised back allocation a about-face block?

______________________________________________________________________

8 What is a blow domain? Area does it abide in a switched LAN?

______________________________________________________________________

9 What are the signs of an colossal about-face block?

______________________________________________________________________

10 What is a advertisement domain? Area does it abide in a switched LAN?

______________________________________________________________________

11 What are the attributes and issues of accepting a burst amount block?

______________________________________________________________________

12 What is a VLAN, and why is it used?

______________________________________________________________________

Q&A 55

13 Back would a Band 3 amount block be adorable or necessary?

_______________________________________________________________________

14 In which OSI band do accessories in the administration band usually operate?

_______________________________________________________________________

15 What is arrangement segmentation? Back is it necessary? How is it done in a campus network

design?

_______________________________________________________________________

16 How abounding layers are adapted in the hierarchical campus arrangement architecture model?

_______________________________________________________________________

17 How abounding switches are acceptable in a amount block design?

_______________________________________________________________________

18 Which Cisco about-face articles should be acclimated in the administration band of a campus

network?

_______________________________________________________________________

19 List three methods acclimated for Band 3 switching in Cisco products.

_______________________________________________________________________

56 Affiliate 2: Campus Arrangement Architecture Models

20 Back ability a Catalyst 5000 be called for use in a abject closet? What attributes make

it a acceptable choice?

______________________________________________________________________

21 Which Cisco Catalyst switches can be acclimated in the admission layer? (Consider the most

important attributes of admission band switches.)

______________________________________________________________________

22 What architecture blocks are acclimated to body a scalable campus network?

______________________________________________________________________

23 Which Cisco about-face ancestors has the best scalable performance?

______________________________________________________________________

24 What are two types of amount or courage designs?

______________________________________________________________________

25 Which Cisco about-face ancestors is the best adjustable for arrangement media and translation?

______________________________________________________________________

Scenario 2-3: Ample Action Campus Arrangement Architecture 57

Scenarios

Scenario 2-1: Baby Campus Arrangement Design

A baby aggregation is housed in a distinct architecture with two floors. There are about 20 users per

floor, all application Ethernet (10/100). All users charge admission to email and database servers that are

located on the aboriginal floor. Future advance in the aggregation is possible. Be abiding to accede scalable

growth in the arrangement design. The tasks for this book are as follows:

1 Sketch out a arrangement architecture for this company, based on the hierarchical architecture model.

2 What Cisco about-face accessories can be acclimated in the admission layer?

3 What Cisco about-face accessories can be acclimated in the administration layer?

4 Will a amount band be necessary? If so, what articles will be used?

Scenario 2-2: Medium Campus Arrangement Design

A aggregation owns two barrio with three floors each. On anniversary floor, there are 100 users

organized by department. All but one attic are Ethernet users, while one attic has Token Ring

users that admission the accumulated mainframe. An action server acreage is currently in use,

connected by FDDI. The association would like to drift to a absolutely switched ambiance for

maximum performance. The mainframe users will abide to use Token Ring. The server farm

will abide affiliated by FDDI during arrangement migration, but can again use added Ethernet

technologies (Fast Ethernet, Fast EtherChannel, and so on). The tasks for this book are as

follows:

1 Sketch out the apparatus for the new design, based on the hierarchical architecture model.

The applicant association wants to arrange the aforementioned artefact in all locations to aerate their

investment aegis and affluence of management.

2 What Cisco about-face articles can be acclimated at anniversary band of the design? Because all switch

devices will use the aforementioned abject platform, agenda which media will be acclimated in anniversary location.

In addition, agenda area Band 3 or MLS will be acclimated and the Cisco accessories bare for that

functionality.

3 Area should the action assets (mainframe, server farm, and so forth) be placed?

Scenario 2-3: Ample Action Campus Arrangement Design

A ample accumulated campus has an absolute baffled and switched arrangement ambiance in place.

Although the absolute arrangement is abundant larger, the basal anatomy is apparent in Figure 2-12. Both

the server acreage and the mainframe are advised action resources. All switches in use are

Layer 2-only devices.

58 Affiliate 2: Campus Arrangement Architecture Models

Figure 2-12 Diagram for Book 2-3

The tasks for this book are as follows:

1 What improvements can be fabricated to the arrangement design? (Don’t anguish about IP

addressing schemes or problems during clearing to a new design.)

2 Redraw this arrangement so that it follows the hierarchical campus arrangement architecture model.

3 Area should the mainframe connect? Why?

4 Area should the servers connect? Why?

5 Area should the WAN affix to the network? Why?

6 Are the routers in use best ill-fitted area they are? Could they be alter or re-deployed

elsewhere? How?

7 How has back-up been addressed? What improvements could be suggested?

8 What types of amount architecture ability be adapted for a ample campus like this? What

considerations should be fabricated for amount connectivity?

9 How should new assets (a workgroup, a server, a user, and so on) be affiliated to the

network if all admission band ports are occupied? What problems would action if the new

resources were affiliated into the amount or anon to a administration band switch?

WAN

Mainframe

Server

farm

Layer 2 switches

Campus buildings

Layer 2 switches

Scenario 2-1 Answers: Baby Campus Arrangement Architecture 59

Scenario Answers

Scenario 2-1 Answers: Baby Campus Arrangement Design

1 See Figure 2-13 for a arrangement drawing. For a arrangement of this size, a burst amount can be

used, as apparent in the diagram.

Figure 2-13 Arrangement Diagram for Book 2-1 Solution

2 Admission band switches could be Catalyst 1900, if 10-Mbps Ethernet will be acclimated for a long

time. Otherwise, Catalyst 2900XL or 3500XL switches could be acclimated for 10/100

connectivity.

3 At the administration layer, either Catalyst 2926G, 2948G-L3, or Catalyst 5000s with an

RSM could be used. (The accepted admeasurement of this arrangement does not accreditation Band 3

functionality; a flat, switched arrangement would assignment accomplished until the arrangement grows.)

4 A amount band is not necessary. With the burst amount design, however, advance and

scalability are calmly managed by abacus about-face blocks.

First attic Second floor

60 Affiliate 2: Campus Arrangement Architecture Models

Scenario 2-2 Answers: Medium Campus Arrangement Design

1 See Figure 2-14 for a arrangement drawing. Anniversary architecture is advised to be a about-face block,

with two administration switches anniversary for redundancy. Two switches are acclimated in the amount for

a bifold amount design.

Figure 2-14 Arrangement Diagram for Book 2-2 Solution

2 Because the chump requires the aforementioned about-face belvedere for all locations, the Catalyst

5000 alternation becomes a accustomed choice. Fast Ethernet media is acclimated from all admission layer

switches to the end users. Token Ring is acclimated on one attic of Architecture 2 to abutment those

Core

Server acreage Mainframe

Building 1 Architecture 2

Enet

Scenario 2-3 Answers: Ample Action Campus Arrangement Architecture 61

users. FDDI can be acclimated to affix the servers to their administration switches until a media

migration is performed. Gigabit Ethernet is acclimated to affix all administration switches into

the core. For MLS, Catalyst 5000s are acclimated at the administration band with chip RSM.

3 The action server acreage is congenital as a server block, affiliated anon into the

two amount switches. The mainframe, because it is an action resource, is placed in a

mainframe block with bombastic links into its administration switches and into the core.

Scenario 2-3 Answers: Ample Action Campus

Network Design

1 This arrangement could be bigger by affective against a hierarchical campus design. A Layer

2 courage is actuality acclimated with two switches, admitting they are not redundant. The

distribution band uses acceptable routers, causing a abeyant aqueduct for all traffic

passing into the core. All added action assets affix into the administration layer

routers, apparently because the routers inherently abutment WAN admission and Band 3

routing.

2 See Figure 2-15 for a new arrangement architecture drawing.

Figure 2-15 Arrangement Diagram for Book 2-3 Solution

3 The mainframe, because it is an action resource, should become its own about-face block.

The mainframe should affix into the amount for best achievement and availability.

Layer 2

core

Layer 2

access layer

Campus

buildings

WAN

Mainframe

Server

farm

62 Affiliate 2: Campus Arrangement Architecture Models

4 The server acreage should be migrated into an absolute server block and connected

directly to the core. Therefore, all users beyond the campus can admission any server

efficiently. All users again become the aforementioned “distance” from the server farm, behindhand of

location.

5 The WAN should affix to one or added routers set abreast for WAN purposes. This WAN

block would again affix anon into the core, as added about-face blocks do—maximizing

availability of WAN admission while alms scalability as the WAN grows.

6 This arrangement is not authoritative the best use of the routers area they are. The routers should

be relocated into a WAN block, as mentioned previously. Band 3 switching should be

implemented in the administration layer, in abode of the routers.

7 Evidently, back-up has not been addressed in this arrangement design. No bombastic links

exist amid admission and administration devices, amid administration and amount devices, and

between amount accessories themselves. In addition, the server acreage and mainframe accept alone a

single articulation anniversary into the network.

8 Back-up could be implemented with bombastic links amid all about-face layers. A

redundant articulation should be configured amid administration switches. Bombastic links

should be present amid the WAN, server, and mainframe blocks into the core.

9 For this network, a bifold amount would apparently be sufficient. Amount connectivity could be

provided application Band 2 switches and bombastic links to anniversary about-face block. Otherwise,

Layer 3 switches could be acclimated in the core, with bombastic links amid the core

switches.

If the admission band is port-bound, a new admission band about-face should be added into a switch

block. Connecting users, servers, or added assets anon into the administration band or

into the amount band will work, but this affiliation defeats the purpose of the architecture block

design—scalability and organization. As added accessories are affiliated into the high layers

of the arrangement design, any faculty of scalability is absent and troubleshooting becomes

difficult.