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QUESTION 21 Which of the statements below is a characteristic of a Switch Port Analyzer (SPAN) session?
A. Affects switching traffic on source ports.
B. Associates multiple source interfaces with a single destination interface.
C. Eliminates multiple copies of packets.
D. Associates a source interface with multiple destination interfaces. Answer: B Explanation: On page 481 of Cisco Press BCMSN exam cert guide, it states that SPAN source can be one or more ports to one destination. Not A: Traffic on the source port is merely copied, so original traffic is not affected. Answer A states that traffic would be affected
QUESTION 22 Drag-and-drop the technology term in the options column to the matching term in the target Area. Not all options are used.
Answer: LANE - ATM ISL - Encapsulation frames 802.1Q - embedded VLAN tag 802.10 - Fiber Links, FDDI VLAN VMPS Explanation:
- LANE - LAN Emulation - An IEEE standard method for transporting VLANs over Asynchronous Transfer
- Mode (ATM) networks.
- ISL - A Cisco Proprietary encapsulation protocol for interconnection multiple switches.
- 802.1Q - An IEEE standard method for identifying VLANs by inserting a VLAN identifier into the frame header. This process is called frame tagging.
- 802.10 - A Cisco Proprietary method of transporting VLAN information inside the standard 802.10 frame (Fiber Distributed Data Interface [FDDI]). Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 99
QUESTION 23 With regard to Virtual Router Redundancy Protocol (VRRP), which of the following statements best describes VRRP?
A. A VRRP group has one active and one more standby virtual routers.
B. A VRRP group has one master and one more backup virtual routers.
C. A VRRP group has one active and one more standby virtual routers.
D. A VRRP group has one master and one redundant virtual router. Answer: B Explanation: The Virtual Router Redundancy Protocol (VRRP) feature can solve the static configuration problem. VRRP enables a group of routers to form a single virtual router. The LAN clients can then be configured with the virtual router as their default gateway. The virtual router, representing a group of routers, is also known as a VRRP group. In a topology where multiple virtual routers are configured on a router interface, the interface can act as a master for one virtual router and as a backup for one or more virtual routers. Reference: http://www.cisco.com/en/US/products/sw/iosswrel/ps1612/products_feature_guide09186a0080080a60.html
QUESTION 24 Which port state is defined by IEEE 802.1w RSTP?
A. Listening, Learning, Forwarding, Blocking, Disabled
B. Learning, Forwarding, Discarding
C. Listening, Forwarding, Active, Blocking
D. Learning, Active, Block Answer: B Explanation: There are only three port states left in RSTP, corresponding to the three possible operational states. The 802.1d states disabled, blocking, and listening have been merged into a unique 802.1w discarding state. Reference: http://www.cisco.com/en/US/tech/tk389/tk621/technologies_white_paper09186a0080094cfa.shtml#subtopic1a
QUESTION 25 You are a technician at Cisco Highway. You tell your assistant to enable a trunking protocol on a switch in the Cisco Highway network. The protocol must append a four byte CRC to the packet. Which command should your assistant issue?
A. Switch(config-if)#switchport trunk encapsulation fddi
B. Switch(config-if)#switchport trunk encapsulation dot1q
C. Switch(config-if)#switchport trunk encapsulation itef D. Switch(config-if)#switchport trunk encapsulation isl Answer: D Explanation: ISL is made up of three major components: a header, the original Ethernet frame, and a frame check sequence (FCS) at the end. With ISL, an Ethernet frame is encapsulated with a header that transports VLAN IDs between switches and routers. The 26-byte header containing a 10-bit VLAN ID is added to each frame. In addition, a 4- byte tail is added to the frame to perform a cyclic redundancy check (CRC). This CRC is in addition to any frame checking that the Ethernet frame performs. Reference: Building Cisco Multilayer Switched Networks (Ciscopress) page 99
QUESTION 26 You are a technician at Cisco Highway. Your newly appointed Cisco Highway trainee wants to know what the technology is called that manages multicast traffic at Layer 2 by means of configuring Layer 2 LAN interfaces dynamically to forward multicast only to those interfaces that want to receive it?
A. IGMP
B. IGMP snooping
C. DVMRP
D. PIM-DM
E. OSPF Answer: B Explanation: Understanding IGMP Snooping In subnets where you have configured either IGMP (see "Configuring IP Multicast Layer 3 Switching") or the IGMP queried (see the "Enabling the IGMP Queried" section), IGMP snooping manages multicast traffic at Layer 2 by configuring Layer 2 LAN interfaces dynamically to forward multicast traffic only to those interfaces that want to receive it. Reference: http://www.cisco.com/en/US/products/hw/switches/ps708/products_configuration_guide_chapter09186a00800f 4ff2.html
QUESTION 27 Which of the following statements regarding the Metro 802.1-in-Q model is true? (Choose all that apply.)
A. Customer VLAN traffic is isolated from the service provide network's VLAN traffic.
B. Quality of service can be easily implemented using the Customer's ToS and CoS.
C. It has limited scalability in a service provider WAN.
D. Customer traffic retains original VLAN tags.
E. It provides efficient Layer 3 access.
F. It can connect disparate customer networks (Frame Relay, Ethernet, ATM, etc). Answer: A, C, D Explanation: Correct answers should be A, C, and D. On Page 480 of the Cisco Press BCMSN Flash Card book, it lists advantages for the 802.1Q in Q model. A, C and D are listed. E is incorrect because it all occurs at layer 2. F is actually listed as on EoMPLS advantage, not Q in Q.
QUESTION 28 Which of the password types illustrated below requires encryption with the service password-encryption command that will prevent transmission in clear text? (Choose all that apply.)
A. Enable password
B. User password
C. Secret password
D. Privilege password
E. Line password Answer: B D E Explanation:
- To set a local password to control access to various privilege levels, use the enable password command in global configuration mode. Use the no form of this command to remove the password requirement.
- To set the privilege level for a command, use the privilege level (global) command in configuration mode. Use the no form of this command to revert to default privileges for a given command.
- To set the default privilege level for a line, use the privilege level (line) command in line configuration mode. Use the no form of this command to restore the default user privilege level to the line. Reference: http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_command_summary_chapter09186a00800 880b0.php#xtocid116918
QUESTION 29 IEEE 802.1Q is specified as the encapsulation method for a trunked port on a Cisco IOS switch by which of the following commands? (Select the appropriate option)
A. Switch(config-if)#switchport trunk encapsulation dot1q
B. Switch(config-if)#switchport encapsulation dot1q
C. Switch(config-if)#switchport trunk encapsulation isl
D. Switch(config)#switchport 0/1 trunk encapsulation isl Answer: A Explanation: Ethernet Trunk Encapsulation Types:
- switchport trunk encapsulation isl - Specifies ISL encapsulation on the trunk link.
- switchport trunk encapsulation dot1q - Specifies 802.1Q encapsulation on the trunk link.
- switchport trunk encapsulation negotiate - Specifies that the interface negotiate with the neighboring interface to become an ISL (preferred) or 802.1Q trunk, depending on the configuration and capabilities of the neighboring interface. The trunking mode, the trunk encapsulation type, and the hardware capabilities of the two connected interfaces determine whether a link becomes an ISL or 802.1Q trunk. Reference: http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_guide_chapter09186a008007 f659.html
QUESTION 30 Cisco Highway.com has just purchased a new Catalyst 2950 layer switch for their parts department. The switch needs to have the passwords to secure access to the device's privileged EXEC mode, the five VTY sessions and to the console. All passwords will need to be encrypted so that they are unable to be read when viewing the configuration. The switch also requires that only the management VLAN (VLAN1) have access to the switch via Telnet. The management VLAN1 has already been configured.
Management VLAN IP address: 192.168.54.12/24 The passwords to be set are listed below. Console: Cisco Highway Privilege EXEC: test33 VTY sessions: king66 To configure the switch click on the host icon that is connected to a switch by a serial console cable.
Answer: Switch(config)#enable password test33 Switch(config)#lline console 0 Switch(config-line)#login Switch(config-line)#password Cisco Highway Switch(config-line)#line vty 0 4 Switch(config-line)#login Switch(config-line)#password king66 Switch(config-line)#exit Switch(config)#service password-encryption
(setting an unencrypted privilege password) (going into line console configuration mode) (enabling login) (setting console password) (going into telnet line configuration for 5 lines) (enabling login) (setting telnet password) (exiting line configuration mode) (encrypting all passwords so far set) Switch(config)access-list 1 permit 192.168.54.0 0.0.0.255 (Creating access list to permit users in the traffic
Switch(config)#line vty 0 4 the
"access- Switch(config-line)#access-class 1 in Switch(config-line)#^Z Switch#copy run start management vlan. Remember the implicit deny at the end of every access list will deny any other
since the above permit statement allows only the management vlan. (going into telnet line configuration mode to enable
access list we have created with the command class") (enabling the access list as an inbound access list) (exiting line config mode) (saving your configuration)
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