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830-01 Questions and Answers

Question # 6

Citrix optimization does not work although you removed ports 1494 and 2598 from the Interactive Ports label and enabled Citrix optimization on the client-side Steelhead appliance. What could be the problem? (Select 2)

A.

You need to enable Citrix optimization on the server-side Steelhead appliance.

B.

Secure ICA encryption needs to be enabled.

C.

Citrix CDM optimization needs to be enabled.

D.

You need to restart the optimization service.

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Question # 7

-- Exhibit –

-- Exhibit --

Refer to the exhibit. In a WCCP environment with R3, SH10 and SH11, which statement below is true?

A.

The Steelhead appliance is only receiving HTTP traffic from the router.

B.

All traffic will be sent from the router to the Steelhead appliance.

C.

The Steelhead appliance will not receive HTTP traffic from the router.

D.

There is no need to use access-lists on the router to select HTTP traffic.

E.

The Steelhead appliance is only receiving traffic on port TCP 1741.

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Question # 8

You are using TCPdumps on the server-side SteelHead to troubleshoot an application connectivity issue. The following filter is used on the TCPdump:

(host and host ) or (host and host ) or (proto gre and ((ip[40:4] =

and

ip[44:4] = ) or (ip[40:4] = and ip[44:4] = )) or (port 7850)

What part of the filter captures the traffic which the Interceptor has applied NAT to?

A.

(ip[40:4] = and ip[44:4] = )

B.

(host and host )

C.

(proto gre and ((ip[40:4] = and ip[44:4] = )

D.

(host and host )

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Question # 9

A SteelCentral Controller for SteelHead (SCC) shows ≠ against some of the SteelHeads in the list. What exactly does this mean?

A.

The policy has a conflict with another policy set for the SteelHead or group.

B.

It is a new SteelHead and has not been allocated any policies.

C.

A SteelHead has been moved to a different group and the policies have not been pushed to the SteelHead.

D.

The configuration on the SteelHead might not match the policies configured on the SCC due to a change on the SteelHead or SCC.

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Question # 10

Citrix remote applications, running on the server and to access printers and disk drives, are not performing well. What can you configure to improve the performance?

A.

Enable Citrix CDM optimization.

B.

Enable SecureICA encryption.

C.

Session Reliability (CGP) Port.

D.

Enable Citrix Traffic Fallback Behavior.

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Question # 11

While performing a health check for a Steelhead appliance at a remote site, you noticed some of the pass-through traffic should have been optimized. The pass-through reason for the suspicious traffic is "SYN on WAN side". Upon further investigating, you also noticed that all of the traffic initiated at the data center is pass-through while all of the traffic initiated at the remote site is optimized. There is only one path between the data center and the remote site and both Steelhead appliance are physically in-path. What are the possible causes? (Select 2)

A.

There is a pass-through in-path rule configured on the data center Steelhead appliance.

B.

There is a pass-through in-path rule configured on the remote site Steelhead appliance.

C.

There is a pass-through peering rule configured on the data center Steelhead appliance.

D.

The LAN and WAN interfaces on the data center Steelhead appliance are reversed.

E.

The LAN and WAN interfaces on the remote site Steelhead appliance are reversed.

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Question # 12

Which of the following are configurable attributes of an Interceptor appliance? (Select 3)

A.

Synchronizing datastore

B.

Sharing connection state with a parallel Interceptor appliance

C.

Redirect to a Steelhead appliance cluster

D.

Failover to another Interceptor appliance

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Question # 13

Company X has many offshore oil rigs they want to bring optimization to. The only available connection is through a satellite that has frequent bursts of packet loss. There are very few users per rig and HTTPS-based SharePoint performance is so poor they often time out pulling down even a small file. CIFS often does not work at all. They are considering the Steelhead Mobile solution to solve this problem. You suggest they deploy a Steelhead in-path at the data center and:

A.

Steelhead Mobile with FEC turned on to help with lossy links

B.

Steelhead Mobile with HS-TCP configuration

C.

Steelhead Mobile running MX-TCP to deal with the loss

D.

Deploy Steelhead appliances with MX-TCP to deal with the loss

E.

Deploy Steelhead appliances with HS-TCP, Window Scaling, fixed-target rules, and TCP New Reno to overcome the loss

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Question # 14

What happens to traffic when a Steelhead appliance reports admission control?

A.

Traffic will be interrupted

B.

The Steelhead stops the interception of new connections for optimization for as long as it is in admission control

C.

This is just a report and the Steelhead will continue to optimize traffic

D.

The Steelhead will start optimizing faster any new connections

E.

The Steelhead will shut down in less than a minute

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Question # 15

What are the four types of Interceptor appliance In-path rules?

A.

Auto, Pass-through, Drop, Feint

B.

Auto, Pass-through, Discard, Deny

C.

Redirect, Pass-through, Discard, Deny

D.

Auto1, Auto2, Allow, Pass-through

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Question # 16

Adaptive data streamlining provides you:

A.

with the ability to fine tune the data streamlining capabilities, and enables you to obtain the right balance between optimal bandwidth reduction and optimal throughput

B.

with the ability to fine tune the data streamlining capabilities, and enables you to obtain the right balance between optimal bandwidth reduction and optimal acceleration

C.

with the ability to fine tune the compression capabilities, and enables you to obtain the right balance between optimal bandwidth reduction and optimal throughput

D.

with the ability to fine tune the compression capabilities, and enables you to obtain the right balance between optimal bandwidth reduction and optimal acceleration

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Question # 17

Refer to the exhibit.

Assume that a packet being optimized by SH10 incorrectly ends up on SH11 (due to load balancing error, or similar). How can you ensure that this packet is correctly returned to SH10?

A.

Set the WCCP weight of SH10 to be higher than that of SH11

B.

Use fixed-target rules explicitly at SH12 to peer to SH10

C.

Enable destination IP hash and destination port hash

D.

Enable destination IP hash and source port hash

E.

Enable destination IP hash and source IP hash

F.

Enable Connection Forwarding

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Question # 18

The WCCP protocol has a methodology of load balancing with two or more Steelhead appliances. What is the maximum number of buckets used for the HASH assignment?

A.

8

B.

32

C.

64

D.

128

E.

256

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Question # 19

You have a SteelCentral Controller for SteelHead Mobile with a policy that includes auto-discovery rules, enabled Location Awareness and set a minimum latency of 10ms. Your client is now in the branch office, has received this policy and the nearest SteelHead is 2 ms away. What will happen to connections?

A.

The branch steelhead will pass through the traffic because of the RVBD in-path rule.

B.

The SteelHead Mobile client will bypass the branch SteelHead using Enhanced Auto Discovery.

C.

The SteelHead Mobile client will not optimize, letting the branch SteelHead do the optimization.

D.

The branch SteelHead will shut-down the SteelHead mobile client services as they are not needed in branch.

E.

The SteelHead Mobile client will optimize as normal, sharing information with the branch SteelHead.

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Question # 20

Refer to the exhibit.

What configuration option is most relevant on Steelhead A to enable Steelhead Mobile Client R to set up the most efficient optimized connection to Server B?

A.

Enhanced auto-discovery

B.

Simplified Routing

C.

no in-path peering manual enable

D.

in-path rule pass rulenum start

E.

in-path peering rule pass rulenum 1

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Question # 21

Refer to the exhibit.

If Server A is an FTP server, which setting will enable active FTP optimization on Steelhead Mobile Client R?

A.

Steelhead A. in-path auto srcport 20

B.

Steelhead A. in-path auto dstport 20

C.

Client R: in-path auto dstport 20

D.

Default auto-discovery rules will work

E.

None of the above

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Question # 22

The amount of memory required for Steelhead Mobile installation varies between 81 MB to 228 MB. What is the reasons for the variation?

A.

Number of TCP connections

B.

Types of application

C.

Datastore size

D.

Bandwidth

E.

All of the above

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Question # 23

The primary data center Interceptor is configured to fail-to-block. What best describes the result of stopping the Interceptor appliance service?

A.

All traffic passes through the Interceptor appliance

B.

The Interceptor allows UDP traffic to pass-through, but blocks all TCP traffic

C.

Previously optimized connections continue to be redirected, but new TCP connections are passed through

D.

All traffic through the Interceptor will be blocked

E.

The Interceptor appliance communicates to the Steelhead appliances to disable their optimization service

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Question # 24

Branch office users live streaming video URL fragment requests are not optimized even though Microsoft Silverlight stream splitting is enabled. What could be the causing this? (Select 3)

A.

The client-side Steelhead appliance optimization service wasn't restarted.

B.

HTTP optimization is disabled on the client-side Steelhead appliance.

C.

The server-side Steelhead appliance optimization service wasn't restarted.

D.

HTTP optimization is disabled on the server-side Steelhead appliance.

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Question # 25

You deploy a pair of SteelHead appliances in-path. At the server-side, there is a firewall inspecting traffic between the SteelHeads. The firewall must see the original client and server IPs and is configured to drop packets where the same host pairs and port pairs are reused within 30 seconds of termination. Which addressing mode would workaround this issue?

A.

Full Transparency

B.

Port Transparency

C.

Correct Addressing

D.

Full Transparency with reset

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Question # 26

-- Exhibit –

-- Exhibit --

Refer to the exhibit. A Steelhead administrator has recently decided to configure data store synchronization between 2 Steelhead appliances on his data center. After applying the configurations, he noticed that it is not working. According to the logs provided, what would you suggest would fix the problem?

A.

Change the auxiliary ip address on one of the Steelhead appliances.

B.

Configure one Steelhead appliance as backup.

C.

Disable optimization.

D.

Restart services.

E.

Configure one Steelhead appliance as master.

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Question # 27

When deploying Interceptor appliances in a parallel cluster what feature must be disabled to ensure packet redirection upon failure?

A.

Fail-to-wire.

B.

Connection forwarding.

C.

Fail-to-block.

D.

Link State Propagation.

E.

WCCP.

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Question # 28

A customer wants to deploy parallel Interceptor appliances. How should an Interceptor appliance be configured in relation to another parallel Interceptor appliance?

A.

Peer Interceptor

B.

As a failover buddy

C.

As a peer neighbor

D.

A and B

E.

A, B, and C

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Question # 29

A customer with no Steelhead appliances currently deployed wants to test Steelhead Mobile on a client that connects to corporate through a VPN over the Internet. The customer has the requirement that there be no network disruptions during the initial testing phase. Which of the following would work?

A.

Place a Steelhead appliance in-path behind the WAN router and have the Steelhead Mobile client use auto-discovery rules

B.

Use server-side out-of-path with a Steelhead and use fixed-target rules on the Steelhead Mobile clients

C.

Place a Steelhead in-path directly behind the VPN gateway and use auto-discovery on the Steelhead Mobile client

D.

Use server-side out-of-path with the Steelhead Mobile Controller and use a fixed-target on the Steelhead Mobile client

E.

Place the Steelhead Mobile Controller in-path directly behind the VPN gateway and use auto-discovery on the Steelhead Mobile client

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Question # 30

Refer to the exhibit.

What does the term resyncing mean?

A.

All Interceptor appliances have been connected and the appliances are transferring connection information

B.

All Interceptor appliances and all Steelhead appliances have been connected and the appliances are transferring connection information

C.

The connection has been established and the Interceptor appliance is transferring its state information

D.

The connection has been established and the devices are transferring their state information

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Question # 31

The primary purpose of setting proxies (found on Networking – Proxies) on the Interceptor is to:

A.

Allow for a Web or FTP proxy when specifying a URL on the Management Console or CLI

B.

Allow for another Interceptor to redirect on behalf of the current Interceptor

C.

Allow for Steelhead appliances to dynamically handle the load of another Steelhead appliance

D.

Allow for two Interceptor appliances to act redundantly in a serial configuration

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Question # 32

If the VPN concentrator that a Steelhead Mobile client connects to is not in path with a Steelhead appliance, what changes could be made to the Riverbed infrastructure to allow optimization from the Steelhead Mobile clients?

A.

Enable out-of-path support on server-side Steelhead

B.

Add a fixed-target rule in the Steelhead Mobile Acceleration policy

C.

Enable peering rule in Steelhead Mobile client

D.

B and C

E.

A and B

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Question # 33

What is configured in an Acceleration policy? (Choose the best answer)

A.

Redundant Steelhead Mobile Controllers

B.

In-path rules

C.

Group IDs

D.

Port labels

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Question # 34

When upgrading a Virtual Steelhead appliance, what steps can be taken to preserve the existing datastore?

A.

When upgrading a Virtual Steelhead appliance, it is not possible to preserve the existing datastore

B.

Detach the existing datastore and re-attach to the new Virtual Steelhead appliance

C.

Run vMotion and move the datastore to a different ESX host before performing the upgrade and then bring it back afterwards

D.

Move the existing datastore to an NFS share and move it back after the upgrade

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Question # 35

In the exhibit,

there is a resident firewall inside the WAN cloud that drops packets with any TCP option. The customer allows you to use fixed-target rules instead. The firewall policy can only allow unassigned ports 7750-7751 to pass-through it. Additionally, the SH3 has been configured with service port 7750, while SH4 has been configured with service port 7751. Which of the following fixed-target rule specification is correct?

A.

The fixed-target rule at SH4 peers to the inpath0_0 IP address of SH3 as the target appliance with port number 7800. The fixed-target rule at SH3 peers to the inpath0_0 IP address of SH4 as the target appliance with port number 7800.

B.

The fixed-target rule at SH4 peers to the inpath0_0 IP address of SH3 as the target appliance with port number 7810. The fixed-target rule at SH3 peers to the inpath0_0 IP address of SH4 as the target appliance with port number 7810.

C.

The fixed-target rule at SH4 peers to the inpath0_0 IP address of SH3 as the target appliance with port number 7750. The fixed-target rule at SH3 peers to the inpath0_0 IP address of SH4 as the target appliance with port number 7750.

D.

The fixed-target rule at SH4 peers to the inpath0_0 IP address of SH3 as the target appliance with port number 7751. The fixed-target rule at SH3 peers to the inpath0_0 IP address of SH4 as the target appliance with port number 7750.

E.

The fixed-target rule at SH4 peers to the inpath0_0 IP address of SH3 as the target appliance with port number 7750. The fixed-target rule at SH3 peers to the inpath0_0 IP address of SH4 as the target appliance with port number 7751.

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Question # 36

How do you clear the peer affinity information from an Interceptor?

A.

Issue the clear affinity command

B.

Restart the service

C.

Clear the fair peering flag

D.

Pause the Interceptor

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Question # 37

When using Correct Addressing, without Enhanced Auto-discovery (EAD), what is the size of the probe response in the return SYN/ACK packet from the server-side Steelhead appliance?

A.

4 bytes

B.

10 bytes

C.

14 bytes

D.

18 bytes

E.

32 bytes

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Question # 38

How do you clean the datastore on a Steelhead appliance?

1) > restart empty

2) > reload clean

3) # restart empty

4) # restart clean

5) (config) # reload clean

A.

1, 2

B.

2, 3

C.

4, 5

D.

3, 4, 5

E.

1, 2, 3, 4, 5

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Question # 39

The port used by the Steelhead appliance for connection forwarding is:

A.

7810

B.

7850

C.

7801

D.

7820

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Question # 40

In the exhibit,

where should the WCCP redirection take place for server return traffic, assuming redirect IN is used? (Select 2)

A.

A

B.

B

C.

C

D.

D

E.

E

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Question # 41

In an implementation using a 4-port card, which interface could be used as the Connection Forwarding neighbor? (Select 2)

A.

Primary

B.

AUX

C.

inpath0_0

D.

inpath0_1

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Question # 42

What is the command to clear all statistics on a Steelhead appliance?

A.

(config) # stats clear-all

B.

(config) # clear-all stats

C.

(config) # reset stats

D.

(config) # reload stats clean

E.

(config) # clear stats

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Question # 43

Which of the following statements are true about server-side out-of-path deployments? (Select 4)

A.

They require no routing changes

B.

They require the use of WCCP or PBR for traffic redirection

C.

They hide the original client IP address from the server

D.

They require the use of a fixed-target rule on the client-side Steelhead appliance

E.

They require the use of either physical in-path or virtual in-path on the client-side Steelhead appliance

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Question # 44

Which of the following control messages are NOT used by WCCP? (Select 2)

A.

PEEK_A_BOO

B.

I_SEE_YOU

C.

REDIRECT_ASSIGN

D.

REMOVAL_QUERY

E.

KEEPALIVE

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Question # 45

What is the priority bit order for WCCP MASK?

A.

Source port, source IP, destination port, destination IP

B.

Destination port, source port, destination IP, source IP

C.

Source IP, destination port, destination IP, source port

D.

Source port, destination port, source IP, destination IP

E.

There is no priority order. It is weighted through bit assignments.

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Question # 46

A customer noticed that after deploying the Steelhead between their switch and router, OSPF takes much longer to re-converge after the router fails. Which RiOS feature can you enable to reduce the convergence time?

A.

Adjusting the OSPF “keep-alive” timers on the Steelhead appliance

B.

Configure Fail-To-Block on the Steelhead appliance

C.

Enable Link State Propagation

D.

Enable Link State Notification

E.

Configure Rapid Spanning Tree on the Steelhead appliance

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Question # 47

Which of the following configuration policies are supported on the CMC appliance? (Select 4)

A.

Security Policy

B.

Optimization Policy

C.

System Setting Policy

D.

License Policy

E.

Networking Policy

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Question # 48

Which physical Steelhead interface communicates with the Interceptor appliance?

A.

AUX

B.

Primary

C.

wan0_0

D.

B and C

E.

A, B, and C

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Question # 49

Your Steelhead appliance deployment includes users accessing the Internet from branch offices with the traffic being back-hauled to the data center before going out to the Internet. However, HTTP latency optimization does not appear to be very effective, and in certain cases, is slower than without optimization. What settings might help with this Internet-bound traffic?

A.

Riverbed recommends you turn off URL Learning and Parse-and-Prefetch and only enable OPT

B.

Riverbed recommends you enable URL Learning and Parse-and-Prefetch and turn off OPT

C.

Riverbed recommends you turn off URL Learning and only enable Parse-and-Prefetch and OPT

D.

Riverbed recommends you turn off URL Learning, Parse-and-Prefetch, and OPT

E.

Riverbed recommends you enable URL Learning, Parse-and-Prefetch, and OPT

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Question # 50

Refer to the exhibit.

SH3 and SH4 are able to optimize FTP and HTTP sessions between Client41 and the respective application hosts Server31 and Server32. However, optimization seems to be a problem for Client42 and these application hosts. A quick check on SH3 and SH4 registers neither optimized nor pass-through traffic from Client42. Client42 is able to ping to both Server31 and Server32. Note that SH3 and SH4 are in auto-discovery mode. What is the likely cause?

A.

The default gateway of Client41 is configured wrong

B.

The default gateway of Client42 is configured wrong

C.

An outbound access-list specified at R3f0 denies TCP traffic from Client42

D.

The routing protocol between R3 and R4 is configured wrong

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Question # 51

An unwanted Steelhead appliance appears on the current connections list of one of your Steelhead appliances. How can you stop inbound connections from this unknown appliance from optimizing with your Steelhead appliances?

A.

Create new peering rule(s) on your Steelhead appliances

B.

Create new in-path rule(s) on your Steelhead appliance

C.

Create IPSec tunnels between all of your Steelhead appliances

D.

Reload all of your Steelhead appliances

E.

Reload only the data center Steelhead appliance

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Question # 52

Which of the following are valid WCCPv2 control messages? (Select 3)

A.

I_SEE_YOU

B.

HERE_I_AM

C.

REMOVAL_QUERY

D.

REMOVAL_ACK

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Question # 53

Refer to the exhibit.

Corp-A and Corp-B have overlapping address space and therefore the network administrator implemented NAT to overcome this. Users from Corp-A NAT to 172.16.1.0/24 and users from Corp-B NAT to 172.16.2.0/24. Users in Corp-A use the destination address of 172.16.2.0/24 to access the resources in Corp-B. The servers in Corp-B use the client IP for authentication. You deploy the Steelhead appliance using the default WAN visibility mode but noticed all the connections are passed-through. What is the likely problem?

A.

When the Steelhead appliance in Corp-B opens the outer connection, it is using the source IP of 172.16.2.x instead of 192.168.1.x

B.

On the Steelhead appliance in Corp-B, there is a missing static route for the 192.168.1.0/25 network

C.

On the Steelhead appliance in Corp-A, there is a missing static route for the 172.16.2.0/24 network

D.

When the Steelhead appliance in Corp-B opens the outer connection, it is using the source IP of 192.168.1.x instead of 172.16.1.x

E.

None of the above

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Question # 54

The exhibit shows a data center side serial clustering deployment. In this organization, not every remote site has a Steelhead appliance deployed, and all remote locations will be connecting to the data center.

For connections initiated from the data center, there is a possibility that the Steelhead appliances shown in the exhibit will end up peering with each other, rather than the intended remote Steelhead appliances. Where are peering rules needed to prevent this problem?

A.

A only

B.

B only

C.

B and C

D.

A and B

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Question # 55

Refer to the HTTP trace exhibit.

You noticed in the HTTP reports that you are not seeing any hits. What is required in order for HTTP optimization to work?

A.

Client request is missing the “Cache” header

B.

Keep-alive timeout on the server it too short

C.

Server does not support HTTP 1.1 extensions

D.

The “Content-Length” is too long. The HTTP blade can only handle 16K of data.

E.

Server is not setting a cookie

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Question # 56

In a recent in-path deployment, users are complaining that some of their CIFS drive-mapping connections do not appear to be optimized. Upon further analysis, you discover the file shares reside on a domain controller. The Steelhead appliances are deployed in a default configuration. Which of the following is the most likely cause of the problem?

A.

The Steelhead appliance lost an Opportunistic Lock on the file

B.

SMB Signing is set to required

C.

No fixed-target rules installed

D.

Misconfigured Steelhead appliance

E.

Packet ricochet

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Question # 57

A customer with a new physical in-path installation decides to turn on the optimization service during lunch time on a working day. This is done so that he can see if the users perceive any performance improvement. When starting the optimization service, he does not enable the in-path kickoff option. Assuming there were several already active connections when he starts the optimization service, how will the Steelhead appliances handle these existing connections?

A.

The Steelhead appliance will optimize all connections, including pre-existing

B.

The Steelhead appliance will pass-through all pre-existing connections, leaving them un-optimized

C.

The Steelhead appliance will reset all pre-existing connections, thus automatically changing their optimization status from un-optimized to optimized

D.

The Steelhead appliance will list the connections as “pre-existing” on the Current Connections page

E.

Both B and D

F.

Both C and D

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Question # 58

Refer to the exhibit.

A customer is reporting that the first connection from a user to the server is failing. However, subsequent connections work properly and are optimized. How can this problem best be resolved?

A.

Fixed-target rule

B.

Enable RIP/OSPF on the routers

C.

Enable Simplified Routing

D.

Enable QoS

E.

Enable RIP/OSPF on the Steelhead appliances

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Question # 59

How many in-path rules will a WAN-initiated (i.e. SYN packet arrives at a WAN port of an In-path interface) single connection match? Assume no packet ricochet occurs (i.e. the SYN travels through the Interceptor appliance once).

A.

0

B.

1

C.

2

D.

3

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Question # 60

Which user roles and permissions are supported by the CMC appliance? (Select 3)

A.

Read-Only

B.

Read/Write

C.

Write-Only

D.

Deny

E.

Accept

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