2017年思科认证模拟试题及答案二
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Which of the following are types of flow control? (Choose three)
- A．Buffering
- B．Cut-through
- C．Windowing
- D．Congestion avoidance
- E．Load balancing
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The Ezonexam network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test? (Choose two)
- A．ARP
- B．CDP
- C．DHCP
- D．DNS
- E．ICMP
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There are 2 switches in the Ezonexam LAN, with no routers. Ports 1, 2 & 3 are assigned to VLAN 1 in switch 1 and 2 and ports 4, 5 & 6 are assigned to VLAN 2 in both switches. These two switches are connected together via a trunked link. Which of the conditions below would verify trunk and VLAN operation? (Select all valid answers)
- A．Host 1 on VLAN 1 can ping Host 2 on VLAN 1
- B．Host 1 on VLAN 1 can ping Host 4 on VLAN 2
- C．Host 1 on VLAN 1 can not ping Host 2 on VLAN 1
- D．Host 4 on VLAN 2 can not ping Host 1 on VLAN 1
- E．Host 4 on VLAN 2 can ping Host 2 on VLAN 2
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A new switch is being installed in the Ezonexam network and you have been assigned the task of connecting it to an existing switch. In doing this, you want to set up the VLAN Trunking Protocol so that VLAN information can be passed between the switches. Which of the following must you do to accomplish this? (Choose all that apply).
- A．You must set each end of the trunk line to IEEE 802.1e encapsulation.
- B．You must set the same VTP management domain name on both switches.
- C．You must set all ports on the two switches as access ports.
- D．You must configure one of the switches as a VTP server.
- E．You must use a rollover cable to connect the two switches.
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The 201.145.32.0 network is subnetted using a /26 mask. How many networks and IP hosts per network exists using this subnet mask?
- A．4 networks and 64 hosts
- B．64 networks and 4 hosts
- C．4 networks and 62 hosts
- D．62 networks and 2 hosts
- E．6 network and 30 hosts
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Given that you have a class B IP address network range, which of the subnet masks below will allow for 100 subnets with 500 usable host addresses per subnet?
- A．255.255.0.0
- B．255.255.224.0
- C．255.255.254.0
- D．255.255.255.0
- E．255.255.255.224
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You have just installed a new web server on the Ezonexam network. You are required to ensure that the web server is accessible from the Internet. The network uses private addressing, so an IP-to-registered address mapping is required.
To do this, you enter the following command:
Ezonexam(config)# ip nat inside source static 192.168.2.1
198.18.1.254
You unsuccessfully try to ping the Internet from a PC host on the LAN. During the troubleshooting process, you enter the "show ip nat translations" command but the output is blank.
What is the most likely cause of the problem?
- A．The keyword overload is missing from the command.
- B．The NAT pool must be defined first.
- C．An access list must be defined to create static NAT translations.
- D．The interfaces must be configured for NAT.
- E．None of the above
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The Ezonexam corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?
- A．The number of broadcast domains will be decreased.
- B．It will make the broadcasting of traffic between domains more efficient between segments.
- C．It will increase the number of collisions.
- D．It will prevent segment 1's broadcasts from getting to segment 2.
- E．It will connect segment 1's broadcasts to segment 2.
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The Ezonexam network administrator has just issued the "switchport trunk native vlan 998" command on switch VE2. What is the function of this command?
- A．It designates VLAN 998 as the default for all unknown tagged traffic
- B．It designates VLAN 998 for untagged traffic
- C．It blocks VLAN 998 traffic from passing on the trunk
- D．It creates a VLAN 998 interface
- E．None of the above
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Which type of cable should be used to make a connection between the Fa0/0 port on a router and the Fa0/0 port switch?
- A．Rollover cable
- B．Console cable
- C．Crossover cable
- D．Straight-through cable
- E．Serial cable
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What will a new Ezonexam router do during startup if a configuration file is not located in NVRAM?
- A．It will search for the configuration file in the locations specified by boot system commands.
- B．It will search for the configuration file in flash and if no configuration file is found there, it will enter the setup dialog.
- C．It will search for the configuration file on a TFTP server and if no configuration file is found there, it will enter the setup dialog.
- D．It will search for the configuration file in flash and if no configuration file is found there, it will load a limited configuration file from ROM.
- E．It will search for the configuration file on a TFTP server and if no configuration file is found there, it will load a limited configuration file from ROM.
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You need to decide on which trunking method to implement in the Ezonexam network. What is a characteristic of ISL and 802.1q frame. tagging in a switched LAN environment?
- A．They are used to find the best path through a network.
- B．They allow the exchange of filtering tables.
- C．They specify different implementations of the Spanning-Tree Protocol.
- D．They allow the exchange of routing tables
- E．They provide inter-switch VLAN communication.
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When is a switched network that is running the Spanning Tree Protocol considered to be fully converged?
- A．when all switches have the same BID as the root switch
- B．when all switches have received the MAC address of each neighboring switch
- C．when every enabled switch port has been assigned a unique identifier
- D．when every operating switch port is in either the blocking or forwarding state
- E．when all switches are in either client, server, or transparent mode
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Which VTP mode should a Cisco switch be set to if this switch is to add or delete VLANs to a management domain?
- A．Transparent
- B．Server
- C．Auto
- D．Client
- E．User
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As a Ezonexam trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
- A．TestKSwitch(config)# ip route-default 192.168.1.115
- B．TestKSwitch(config)# ip default-gateway 192.168.1.115
- C．TestKSwitch(config)# ip route 192.168.1.115 0.0.0.0
- D．TestKSwitch(config)# ip default-network 192.168.1.115
- E．None of the above
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What kind of cable should be used to establish a trunked line between two Catalyst switches?
- A．A straight-through cable
- B．An EIA/TIA-232 serial cable
- C．An auxiliary cable
- D．A modem cable
- E．A cross-over cable
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The Ezonexam network administrator needs to a switch named VE1 to become the root bridge for a redundant path switched network. What can be done to ensure that VE1 will always assume the role as the root bridge?
- A．Assign the switch a higher MAC address than the other switches in the network have
- B．Establish a direct link from the switch to all other switches in the network
- C．Configure the switch full-duplex operation and configure the other switches for half-duplex operation
- D．Configure the switch so that it has lower priority than other switches in the network
- E．None of the above
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What is the purpose of the spanning-tree algorithm in a switched LAN?
- A．To provide a monitoring mechanism for networks in switched environments.
- B．To manage VLANs across multiple switches.
- C．To prevent switching loops in networks with redundant switched paths.
- D．To segment a network into multiple collision domains.
- E．To prevent routing loops in networks.