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Code d'Examen: 3M0-250
Nom d'Examen: 3COM (3Com Certified Enterprise LAN Post-Sales Expert version 1.0)
Questions et réponses: 50 Q&As

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NO.1 What is the effect of the Simple Network Management Protocol (SNMP) switch command snmp-agent
target-host trap address udp-domain 129.102.149.23 udp-port 5000 params securityname 3comprivate?
A.Configures the switch with a default community string name of 3comprivate
B.Enables the SNMP trap functions on a switch with IP address 129.102.149.23
C.Configures the switch SNMP agent to send traps to the network management station at IP address
129.102.149.23
D.Enables the SNMP trap functions and sets the default community string name of 3compublic on a
switch with IP address 129.102.149.23
Answer: C

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NO.2 How would you view the configuration information that is running on a switch?
A.Use the display startup command
B.Use the display version command
C.Use the display saved-configuration command
D.Use the display current-configuration command
Answer: D

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NO.3 Which Switch 5500 PWR LED condition indicates the switch is powered-up and operating normally?
A.Off
B.Green
C.Green flashing
D.Solid green when not transmitting user data and flashing green when transmitting user data
Answer: B

3COM   3M0-250   3M0-250

NO.4 Which three are Switch 5500 configuration requirements when creating an eXpandable Resilient
Networking (XRN) Fabric? (Choose three.)
A.All units in the stack must have the same sysname
B.All units in the stack must be running the same software version
C.A mixture of switch models can be used to create a single XRN Fabric
D.Switch 5500-SI/EI up/down ports must be enabled for fabric mode
E.A switch must be initialized after it has been added to an existing XRN Fabric
Answer: ABD

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NO.5 What is the reason to connect the up port on the bottom Switch 5500 in the stack to the down port of
the top Switch 5500 in the same stack?
A.Reliability - creates a resilient topology
B.Security - prevents an unauthorized user from connecting to the switch stack
C.Performance - creates the 48-Gbps eXpandable Resilient Networking (XRN) Fabric
D.Management - enables Distributed Resilient Routing (DRR) on the Switch 5500-SI
Answer: A

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NO.6 You have issued the switch debugging command debugging rip packets from the management terminal,
but you are not receiving any debug output. What is the reason you are not getting any debug output from
the switch?
A.RIP has not been enabled, and therefore there is no debug output
B.Output from the debugging command only goes to the syslog server
C.You forgot to issue the enable debugging command at the System View
D.You forgot to issue the terminal debugging command, directing the output to your management terminal
Answer: D

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NO.7 GARP VLAN Registration Protocol (GVRP) maintains and distributes Virtual LAN (VLAN) registration
information only about the dynamically created VLANs using GARP.
A. True
B. False
Answer: B

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NO.8 Which two are general Link Aggregation (LA) configuration rules that must be followed when creating
an LA group? (Choose two.)
A.A member link port can only belong to one LA group
B.Aggregated links are mutually exclusive with roving analysis and mirror ports
C.A port must be configured for resilient links before it can be configured as a member of an LA group
D.LA ports can only be configured if Link Aggregation Control Protocol (LACP) is enabled on the switches
Answer: AB

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NO.9 Which best defines the mechanism of IEEE 802.1X Network Login?
A.An authenticator requests access to network services; the authentication server enforces authentication
before allowing access to the network and validates the supplicant on behalf of the authenticator
B.A supplicant requests access to network services; the authenticator enforces authentication before
allowing access to the network; the authentication server validates the supplicant on behalf of the
authenticator
C.A supplicant requests access to network services; the authentication server enforces authentication
before allowing access to the network; the authenticator validates the supplicant on behalf of the
authentication server
Answer: B

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NO.10 Which switch command shows what is installed in the switch and the current operational status?
A.[SW8800-14slot] display device
B.[SW8800-14slot] display system
C.[SW8800-14slot] display startup
D.[SW8800-14slot] display current-configuration
Answer: A

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NO.11 Which Switch 5500 model(s) does not support Distributed Resilient Routing (DRR)?
A.Switch 5500-EI
B.Switch 5500-SI
C.Switch 5500G-EI
D.All of the above
Answer: B

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NO.12 You have already configured and enabled individual switch ports for IEEE 802.1X Network Login.
What is required for authentication to be activated on the ports?
A.From the System View, enable 802.1X Network Login
B.From the Ethernet Port View, set the port access control mode
C.From the System View, configure the authentication method for 802.1X users
D.From the Ethernet Port View, configure the authentication method, i.e., chap, pap, eap, etc.
Answer: A

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NO.13 Which two are functions of Extensible Authentication Protocol (EAP)? (Choose two.)
A.Provides a framework and transport for the exchange of authentication information between the
authenticator and the supplicant
B.Provides encapsulation for the exchange of information between the authenticator and authentication
server
C.Provides the mechanism for locking/unlocking a switch port based on the results of the supplicants
authentication
D.Provides the mechanism for defining what network resources a user may access based on the
authentication information
Answer: AB

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NO.14 What is the result of the command boot boot-loader file-url?
A.Reboots the switch using the file-url for the operational code
B.Updates the switch BootROM with the file-url on the system flash
C.Reboots the switch fabric only using the file-url for the operational code
D.Specifies the switch to use file-url for the operational code on the next boot
Answer: D

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NO.15 Which security standard is defined by IEEE 802.1X Network Login?
A.Encryption standard for network authorization
B.Port-based Network Access Control protocol standard
C.Extensible Authentication Protocol (EAP) standard for network authorization
D.Authentication, Authorization and Accounting (AAA) standard for network access
Answer: B

3COM examen   certification 3M0-250   3M0-250

NO.16 You have configured multiple OSPF areas on your network. How do the different OSPF areas
communicate with each other?
A.The Designated Router (DR) uses multicast routing to broadcast advertisements to the other area DRs
B.The Designated Router (DR) connects each OSPF area to the main backbone network and
communicates with the other areas
C.The Area Border Router (ABR) connects each OSPF area to the main backbone network and
communicates with the other areas
D.The Autonomous System Border Router (ASBR) connects each OSPF area to the main backbone
network and communicates with the other areas
Answer: C

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NO.17 How must the MAC Radius Authenticated Device Access (RADA) address be configured on the
Switch 5500?
A.Hexadecimal IP address only
B.Hexadecimal MAC address only
C.Binary or hexadecimal IP or MAC address
D.Binary, decimal or hexadecimal MAC address
Answer: B

3COM examen   3M0-250   3M0-250

NO.18 Click on the exhibit button.
Which Switch 7700 command shows all the hardware and software information on the modules (review
the output shown in the exhibit)?
A.[SW7700] display device
B.[SW7700] display version
C.[SW7700] display interfaces
D.[SW7700] display current-configuration
Answer: B

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NO.19 An IP address must be configured on a switch before it can be managed using Telnet.
A. True
B. False
Answer: A

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NO.20 How does the network administrator configure the up/down Switch 5500-EI/SI ports to operate in fabric
mode?
A.By default, the up/down ports are enabled for fabric mode
B.Execute the command xrn-fabric authentication-mode simple
C.Execute the command resilient-arp enable x/x/x where x/x/x identifies the unit and port number
D.Execute the command fabric-port gigabit x/x/x enable where x/x/x identifies the unit and port number
Answer: D

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Code d'Examen: 3M0-200
Nom d'Examen: 3COM (3COM 3M0-200)
Questions et réponses: 50 Q&As

Code d'Examen: 3M0-212
Nom d'Examen: 3COM (Certified Enterprise LAN Pre-Sales Expert version 3.2)
Questions et réponses: 134 Q&As

Code d'Examen: 3M0-250
Nom d'Examen: 3COM (3Com Certified Enterprise LAN Post-Sales Expert version 1.0)
Questions et réponses: 50 Q&As

Code d'Examen: 3M0-700
Nom d'Examen: 3COM (Certified IP Telephony Specialist)
Questions et réponses: 100 Q&As

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NO.1 Which four Call Forward user settings are available to a user logged into NetSet on a NBX
Communication System? (Choose four.)
A. Forward calls to voicemail box
B. Forward calls to an e-mail inbox
C. Disconnect (no forwarding) calls
D. Forward calls to another phone number
E. Forward calls to an Automated Attendant
F. Do not ring, which places the caller into voice mail
G. Forward calls to the LCD Directory so the caller can contact another employee if they choose
Answer: ACDE

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NO.2 Which two devices are not supported by an NBX Analog Terminal Card (ATC) or Analog Terminal
Adapter (ATA)? (Choose two.)
A. Modem
B. FAX machine
C. Cordless phone
D. Credit card reader
E. External bell or pager
F. Standard telephone that requires a DTMF connection
Answer: AD

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NO.3 Which two are features of the NBX NetSet Administration Utility? (Choose two.)
A. Allows users to sign on with a username of "user" and use their voicemail password for access
B. Is found on 3Com's NBX systems, as well as, licensed 3rd party Ethernet-based telephony systems
C. Can be accessed through the default IP address of 192.168.1.190.
D. Can be accessed through the default IP address of 192.168.1.191.
E. Allows the administrator to sign on with a username of "administrator" and a password of "0000" for
access
Answer: CE

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NO.4 How do NBX phones prioritize audio traffic?
A. NBX phones forward all voice packets to IEEE 802.1p aware hubs
B. NBX phones tag voice packets using DiffServ for all LAN communication
C. NBX phones use VLAN-tagged frames with the priority level automatically set to 6
D. NBX phones place audio traffic into a priority queue within the NCP, forwarding all voice traffic before
forwarding data packets
Answer: C

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NO.5 How does the NBX administrator load a local country Dial Plan, for example, Norway or Portugal?
A. Dial Plan / Tables/ User-Defined File ?select country and click Import
B. Dial Plan / Operations/ User-Defined File ?select country and click Import
C. Dial Plan / Tables/ Default File ?select country from drop-down menu and click Import
D. Dial Plan / Operations/ Default File ?select country from drop-down menu and click Import
Answer: D

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NO.6 Which three are maintenance alert features on the NBX system? (Choose three.)
A. Can send alert to voicemail
B. Can send alert to a pager or email
C. Can send alert to 3rd party voice messaging systems
D. Can be configured to send alerts to up to 15 mailboxes
E. Can be configured to send an alert for any physical device failure
F. Maintenance alert function is supported on the NBX 100 Communications System only
Answer: ABD

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NO.7 Which four are features of the NBX Analog Line Card? (Choose four.)
A. An NBX V5000 chassis supports only one Analog Line card at a time
B. The NBX Auto Discover Line Cards function can be used to find newly installed Analog Line Cards
C. In Key System Mode, CO lines connected to an Analog Line Card can be mapped to one or more
telephones
D. Its Power Failure Jack provides access to the telephone CO in case of a NBX power failure
E. By default, when a port is mapped to multiple telephones, calls will ring at the lowest extension first,
then to the next extension, until the call is
Answered
F. In PBX System Mode, CO lines connected to an Analog Line Card are pooled and allocated by the Call
Processor for use by any phone for outbound calls
G. In Hybrid Mode, incoming calls go to an Auto Attendant only and CO lines are pooled and allocated by
the Call Processor for use by any phone on the system
Answer: BCDF

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NO.8 Which three best describe PRI QSIG? (Choose three.)
A. For use on PSTN only
B. Is a proprietary 3Com protocol
C. Designed for IP-PBX to TAPI Server
D. For use on private lines, leased lines or VPN only
E. Optimized for inter-PBX signaling for tie line support
F. Requires clocking (Master mode) by one end station (PBX)
Answer: DEF

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NO.9 Which four are characteristics or requirements for NBX Bridge Station Appearance (BSA) assuming
only 3102 business phones are used in the customer location? (Choose four.)
A. Maps a primary phone to a secondary phone
B. Only need to configure the primary phone settings
C. Up to 16 extensions can be mapped to a common secondary phone
D. To configure BSA settings select Device Configuration / Telephones then select Button Mappings
E. Either phone can
Answer a call, as incoming primary-phone calls appear on primary and secondary phone
F. Incoming calls to primary phone are automatically transferred to secondary phone based on
time-of-day settings
Answer: ACDE

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NO.10 Which two are accurate statements? (Choose two.)
A. NBX 100 supports 48 VTLs
B. NBX V5000 supports 48 VTLs
C. NBX V3000 supports 48 VTLs
D. NBX V5000 supports 72 VTLs
Answer: BC

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NO.11 Which three are true statements concerning Silence Suppression? (Choose 3.)
A. Enabling Silence Suppression prioritizes voice traffic
B. Can be enabled or disabled for the entire system only
C. Can be enabled or disabled only for individual telephones
D. Enabling Silence Suppression reduces network traffic
E. Can be enabled or disabled for the entire system, or for individual telephones and line card ports
F. A device that detects silence in a conversation will not send any packets to the other device during the
period of silence
G. A device that detects silence in conversation sends a small packet with a "silence indicator,"rather than
a full packet of "digitized silence"
Answer: DEG

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NO.12 The NBX Dial Plan supports Direct Inward Dialing/Dialed Number Identification Service (DID/DNIS).
A. True
B. False
Answer: A

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NO.13 Which three are prioritization mechanisms used with the NBX Communication Systems? (Choose
three.)
A. IP TOS
B. Diff Serv
C. IEEE 802.3
D. IEEE 802.1p
E. ANSI 96/RS232
Answer: ABD

3COM examen   3M0-700   3M0-700

NO.14 Which two are features of an NBX Calling Group? (Choose two.)
A. Member phones ring simultaneously for incoming calls
B. Calling Groups are the same as NBX Key Mode configuration
C. Up to 100 Calling Groups can be configured on an NBX 100 system
D. NBX administrator can define "ring progression" for a Calling Group
E. Member login/logout password is defined by NBX administrator using NetSet
Answer: AE

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NO.15 Which three office-to-office and/or office-to-remote user call options are supported by the NBX systems?
(Choose three.)
A. With a single NBX system at HQ, users can call to/from a remote office across the data network WAN
link using Layer 3 IP communications
B. With a NBX Network Call Processor (NCP) and NBX ConneXtions Gateways at each site, users can
call to/from the sites via a Virtual Tie Line (VTL)
C. With a single NBX system at HQ and pcXset on the remote office PC, the remote user can call to/from
HQ via any WAN link using TCP/IP Layer 4 communications
D. With a NBX Network Call Processor (NCP) at each location, users can call to/from the sites via a
Virtual Tie Line (VTL) using IP On-the-Fly or a Standard IP license
E. With a NBX system and NBX ConneXtions Gateways at each location, users can call to/from the sites
via a WAN link that supports IP protocol, for example, VPN, T1, E1 and Frame Relay
Answer: ADE

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NO.16 What is the easiest way for the NBX system administrator to set up calling permissions and/or
restrictions for a group of users?
A. Define a Type of Service (ToS) and then assign the ToS to each user
B. Define a Class of Service (CoS) and then assign the CoS to each user
C. Define a User Configuration and then assign the Configuration to each user
D. Define a Type of Service (ToS), define a new group for the users and then assign the group to the new
ToS
E. Define a Class of Service (CoS), define a new group for the users and then assign the group to the new
CoS
Answer: B

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NO.17 Which three best describe how members Login/Logout of a Hunt Group? (Choose three.)
A. Group members can login and logout as their schedule requires
B. A forced login member is always logged in whether they are at their phone or not
C. To login/logout a user only needs to pickup their phone and enter their voice mail password
D. Administrator can set optional automatic logout to force a logout if an incoming call is not
Answered at a phone
E. All members must login only once during the day. They are automatically logged out at the end of the
day based on the NBX System Business Time definition
F. A dynamic login member must login at the start of a day and will only need to login again if they are
logged out after 15 minutes pass between phone calls
Answer: ABD

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NO.18 Which four are features of the NBX QSIG Basic Service support? (Choose four.)
A. Recommended for use on a PSTN public network
B. Passes Caller ID information across QSIG tie lines
C. NBX system only functions in Slave Mode operation
D. Used to nest traditional PBX systems behind an NBX
E. Supports fractional QSIG on the NBX Digital Line Cards
F. Optimized for inter-PBX signaling, useful for implementing tie trunks
G. Connects 3rd party PBX systems with Master Mode support to an NBX system
Answer: BCFG

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NO.19 A manager at extension 3002 has asked you to setup a NBX Communication System to allow an
assistant at extension 1010 to filter calls. You have decided the best way to do this is Bridged Station
Appearance. You have already setup the primary phones button mappings. Which is the correct
extension number to add to the secondary phone Bridged Extension Number Field?
A. 1010
B. 1010-2
C. 3002
D. 3002-2
Answer: C

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NO.20 Which of the following terms are associated with Emergency 911?
A. 911 Database
B. ACT -Automatic Caller Tracking
C. PSAP-Public Safety Access Point
D. ALI -Automatic Location Identification
E. ANI-Automatic Number Identification
F. PEAP -Public Emergency Access Point
Answer: ACDE

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