DHCP snooping on Cisco Nexus 1000V Series Switches acts like a firewall between untrusted hosts and trusted DHCP servers by doing which of these？ （）

A . debug dhcp enable B . debug dhcp status enable C . debug dhcp packet enable D . enable debug dhcp packet

A . requires the Basic or Advanced Signature Definition File B . uses the built-in signatures that come with the Cisco IOS image as backup C . supports SDEE，SYSLOG，and SNMP for sending Cisco IPS alerts D . uses Cisco IPS 5.x signature format

A . when a packet is received from an 802.1Q trunk，the vlan id can be determined from the source MAC address table B . unkown unicast frames are retransmitted only to the ports that belong to the same vlan C . ports between switches should be configured in access mode so that vlans can span across the ports D . broadcast and multicast frames are retransmitted to ports that are configured on different vla

A . 1   B . 3   C . 5   D . 7

A .  Configure the switch to insert and remove DHCP relay information （option-82 field） in forwarded  DHCP request messages. B .  Configure DHCP snooping globally. C .  Configure the switch as a DHCP server. D .  Configure DHCP snooping on an interface. E .  Configure all interfaces as DHCP snooping trusted interfaces. F .  Configure DHCP snooping on a VLAN or range of VLANs.

A . enable cdp B . cdp enable C . cdp run D . run cd

A .  show memory detailed B .  show process cpu sorted C .  show system resources D .  show hardware capacity

A . windows 2000 sp4 B . windows server 2003 C . solaris 10 D . vista E . windows xp pro

A . DHCP requests will be switched in the software， which may result in lengthy response times. B . The switch will run out of ACL hardware resources. C . All DHCP requests will pass through the switch untested. D . The DHCP server reply will be dropped and the client will not be able to obtain an IP address.

A . ipv6 host B . ipv6 unicast-routing C . ipv6 local D . ipv6 neighbor

A . Cisco Unified CallManager cluster setup   B . SQL 2K server setup   C . Cisco CRS server setup   D . Cisco CRS cluster setu

A .  In a vPC topology， the primary HSRP router will respond to ARP requests， but both HSRP routers will forward data traffic. No additional configuration is required. B .  In a vPC topology， the primary HSRP router will respond to ARP requests， but both HSRP routers will forward data traffic if the peer-gateway feature is enabled. C .  You can configure two overlapping HSRP groups to load share traffic from the connected hosts while providing the default router redundancy. D .  You can use the show standby command to verify HSRP operation and configuration. E .  If you remove the feature hsrp command， all relevant HSRP configuration information isalso removed.

A . Use network options to enable ipforwarding B . Edit /etc/rc.tcpip and enable dhcpsd C . Edit /etc/rc.nfs increase the number of biod daemons D . Use SMIT to set the server to use DHCP instead of static IP addresse

A . when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table. B . unkown unicast frames are retransmitted only to the ports that belong to the same vlan C . ports between switches should be configured in access mode so that vlans can span across the ports D . broadcast and multicast frames are retransmitted to ports that are configured on different vlan.

A . 防御改变CHADDR值的饿死攻击 B . 防御DHCP仿冒者攻击 C . 防御TCP flag攻击 D . 防御中间人攻击和IP/MAC Spoofing攻击

A . 只能在二层模式 B . 只能在三层模式 C . 二三层模式都可以 D . 二三层模式都不可以

A . The IP address can be automatically assigned to a host. B . The IP address can be assigned as a random hash value of the burned - in - address of the lowest - numbered LAN interface on the router. C . The network administrator can assign a speci fic IP address to a specific host MAC address. D . The IP address can be assigned from configured pools in a reverse lexicographical order. E . The IP address can be assigned to a host for a limited time or until the host explicitly releases the address. F . The IP address can be assigned to a host until the host usurps the assigned value using its own dynamic override mechanism.

A . The router will distribute IP addresses from pool 1 until its addresses are exhausted. Then therouter will begin distributing addresses from pool 2 B . The configuration is invalid because the DHCP options are global configuration commands C . The configuration is incomplete until the DHCP pools are bound to the appropriate interface orinterfaces D . The router will choose which pool to use based upon the interface the DHCP request wasreceived o

A . online product and technology information B . knowledge transfer resources C . online hardware replacement D . tools to minimize the risk of network downtime E . network management and diagnostic tools F . online solution troubleshooting

A . Ports Fa2/1 and Fa2/2 source DHCP requests only. Port Fa3/1 is eligible to source all DHCP messages and respond to DHCP requests. B . Ports Fa2/1 and Fa2/2 respond to DHCP requests only. Port Fa3/1 is eligible to source all DHCP messages. C . Ports Fa2/1 and Fa2/2 are eligible to source all DHCP messages and respond to DHCP requests. Port Fa3/1 can source DHCP request only. D . All three ports， Fa2/1， Fa2/2， and Fa3/1， are eligible to source all DHCP messages and respond to DHCP requests.

A . Installed Hardware serial numbers B . The status of installed hardware C . Installed hardware D . Unique Device Identifier E . system internal temperature F . main power supply conditio

A .  The supervisor module enforces CoPP before out-of-policy traffic reaches the CPU B .  The fabric modules enforce CoPP in the fabric before out-of-policy traffic reaches the CPU  C .  The linecards enforce CoPP locally before out-of-policy traffic reaches the CPU D .  The egress virtual output queue enforces CoPP locally before out-of-policy traffic reaches the CPU

A .  DHCP snooping commands are not available until the feature is enabled with the feature dhcp- snooping command. B .  When you enable the DHCP snooping feature， the switch begins building and maintaining the DHCP snooping binding database. C .  The switch will not validate DHCP messages received or use the DHCP snooping binding database to validate subsequent requests from untrusted hosts until DHCP snooping is enabled globally and for each specific VLAN. D .  Globally disabling DHCP snooping removes all DHCP snooping configuration on the switch. E .  Globally disabling DHCP snooping does not remove any DHCP snooping configuration or the configuration of other features that are dependent upon the DHCP snooping feature.

A . Attacker sends multiple DHCP requests flooding DHCP server B . Attacker connects rogue server initiating DHCP requests C . Attacker connects rogue server replying to DHCP requests D . Attacker sends DHCP jam signal causing DHCP server to crash E . Attacker sends gratuitous ARP replies， thereby jamming the DHCP server F . Attacker sends unsolicited DHCP replies， thereby jamming the DHCP server