How does a DHCP server dynamically assign IP addresses to hosts?（）A、Addresses are permanently assigned so that the host uses the same address at all times.B、Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.C、Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.D、Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
How does a DHCP server dynamically assign IP addresses to hosts?（）
- A、Addresses are permanently assigned so that the host uses the same address at all times.
- B、Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.
- C、Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.
- D、Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
相关考题：
When controlling the virtual router assignment for a PPP over ATM client, which mechanism does the router use first?() A. profileB. domain mapC. DHCP serverD. RADIUS server
When does the E－series router start monitoring DHCP traffic using the DHCP External function?() A. When the discovery packet enters the router from the DHCP client.B. Only when the offer packet enters the router from the DHCP server.C. When the acknowledge packet enters the router from the DHCP server.D. Only when the discovery packet leaves the router going to the DHCP server.
The ERX Edge Router in your Bridged 1483 network has multiple external DHCP servers configured.During discovery, which algorithm does the router use to decide which DHCP server to send packets to?() A. direct modeB. round robinC. weighted round robinD. No algorithm is used.
In a Bridged 1483 network, which set of configuration commands allows the router to forward requests from the PC to an external DHCP server at 3.3.3.3?() A. set dhcp relay 3.3.3.3 set dhcp relay agentB. enable dhcp relay agent set dhcp relay agentC. set dhcp server 3.3.3.3 enable dhcp relay agentD. enable dhcp server 3.3.3.3 enable dhcp relay agent
How does the ERX Edge Router interact with an external DHCP server in a Bridged 1483 network?() A.It maintains DHCP leases on behalf of subscribers.B.It initiates DHCP requests on behalf of subscribers.C.It passes DHCP traffic to and from the server;you must configure static host routes.D.It passes DHCP traffic to and from the server and inserts host routes into its routing table.
How does a DHCP server dynamically assign IP addresses to hosts?() A.Addresses are permanently assigned so that the host uses the same address at all times.B.Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.C.Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.D.Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
Which is the result of enabling IP Source Guard on an untrusted switch port that does not have DHCP snooping enabled？（）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.
Which of the following types of attacks does DHCP snooping prevent？（Choose all that apply.）（）A、Attacker sends multiple DHCP requests flooding DHCP serverB、Attacker connects rogue server initiating DHCP requestsC、Attacker connects rogue server replying to DHCP requestsD、Attacker sends DHCP jam signal causing DHCP server to crashE、Attacker sends gratuitous ARP replies， thereby jamming the DHCP serverF、Attacker sends unsolicited DHCP replies， thereby jamming the DHCP server
A new Aironet 1200 series AP has been installed in the Company WLAN. What happens when this device is connected to the LAN， with a default configuration？（）A、 The access point will attempt to download an encryption key from the nearest wireless server.B、 The access point makes several attempts to get an IP address from the DHCP server. If the access point does not receive an address， it assigns itself the IP address 10.0.0.1 for 5 minutes.C、 The access point will attempt to connect to the nearest wireless server using LEAP authentication.D、 The access point requests an IP address from the DHCP server. If the access point does not receive an address， it continues to send requests indefinitely.E、 None of the other alternatives apply
You have a DHCP server named Server1 and an application server named Server2. Both servers run Windows Server 2008. The DHCP server contains one scope. you need to ensure that server2 alwaysreceives the same IP address. Server2 must receive its DNS settings and its Wins settings from DHCP. What should you do？（）A、Create a multicast scopeB、Assign a Static IP address to Server2C、Create an exclusion range in the DHCP scopeD、Create a DHCP reservation in the DHCP scope.
Which two tasks does the Dynamic Host Configuration Protocol perform?（）A、Set the IP gateway to be used by the network.B、Perform host discovery used DHCPDISCOVER message.C、Configure IP address parameters from DHCP server to a host.D、Provide an easy management of layer 3 devices.E、Monitor IP performance using the DHCP server.F、Assign and renew IP address from the default pool.
How is DHCP enabled on a server？（）A、Use network options to enable ipforwardingB、Edit /etc/rc.tcpip and enable dhcpsdC、Edit /etc/rc.nfs increase the number of biod daemonsD、Use SMIT to set the server to use DHCP instead of static IP addresses
How does the ERX Edge Router interact with an external DHCP server in a Bridged 1483 network？（）A、It maintains DHCP leases on behalf of subscribers.B、It initiates DHCP requests on behalf of subscribers.C、It passes DHCP traffic to and from the server;you must configure static host routes.D、It passes DHCP traffic to and from the server and inserts host routes into its routing table.
How does the ERX Edge Router interact with subscriber IP addresses assigned by an external DHCP server?（）A、It monitors messages from the external server and updates the routing table as needed.B、It maintains the leases for the DHCP server and reassigns addresses to new subscribers.C、It sends keep alives to the subscriber and makes the address available when the subscriber stops responding.D、It sends keep alives to the subscriber and removes the host route when the subscriber stops responding.
The ERX Edge Router in your Bridged 1483 network has multiple external DHCP servers configured.During discovery, which algorithm does the router use to decide which DHCP server to send packets to?（）A、direct modeB、round robinC、weighted round robinD、No algorithm is used.
How does the ERX Edge Router interact with subscriber IP addresses assigned by an externa lDHCP server?（）A、It monitors messages from the external server and updates the routing table as needed.B、It maintains the leases for the DHCP server and reassigns addresses to new subscribers.C、It sends keepalives to the subscriber and makes the address available when the subscriber stops responding.D、It sends keepalives to the subscriber and removes the host route when the subscriber stops responding.
When controlling the virtual router assignment for a PPP over ATM client, which mechanism does the router use first?（）A、profileB、domain mapC、DHCP serverD、RADIUS server
Your company has a single Active Directory domain. The domain runs at the functional level of Windows Server 2003. You install the DHCP service on a server named DHCP1. You attempt to start the DHCP service， but it does not start. You need to ensure that the DHCP service starts. What should you do？（）A、Restart DHCP1B、Configure a scope on DHCP1C、Activate the scope on DHCP1D、Authorize DHCP1 in the Active Directory domain
多选题Which of the following types of attacks does DHCP snooping prevent？（Choose all that apply.）（）AAttacker sends multiple DHCP requests flooding DHCP serverBAttacker connects rogue server initiating DHCP requestsCAttacker connects rogue server replying to DHCP requestsDAttacker sends DHCP jam signal causing DHCP server to crashEAttacker sends gratuitous ARP replies， thereby jamming the DHCP serverFAttacker sends unsolicited DHCP replies， thereby jamming the DHCP server
单选题How does the ERX Edge Router interact with an external DHCP server in a Bridged 1483 network？（）AIt maintains DHCP leases on behalf of subscribers.BIt initiates DHCP requests on behalf of subscribers.CIt passes DHCP traffic to and from the server;you must configure static host routes.DIt passes DHCP traffic to and from the server and inserts host routes into its routing table.
单选题How does the ERX Edge Router interact with subscriber IP addresses assigned by an external DHCP server?（）AIt monitors messages from the external server and updates the routing table as needed.BIt maintains the leases for the DHCP server and reassigns addresses to new subscribers.CIt sends keep alives to the subscriber and makes the address available when the subscriber stops responding.DIt sends keep alives to the subscriber and removes the host route when the subscriber stops responding.
单选题How does a DHCP server dynamically assign IP addresses to hosts?（）AAddresses are permanently assigned so that the host uses the same address at all times.BAddresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.CAddresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.DAddresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
单选题How does the ERX Edge Router interact with subscriber IP addresses assigned by an externa lDHCP server?（）AIt monitors messages from the external server and updates the routing table as needed.BIt maintains the leases for the DHCP server and reassigns addresses to new subscribers.CIt sends keepalives to the subscriber and makes the address available when the subscriber stops responding.DIt sends keepalives to the subscriber and removes the host route when the subscriber stops responding.
单选题In a Bridged 1483 service offering， how does an end user’s workstation dynamically obtain an IP address？ （）ARADIUS serverBexternal DHCP serverCaddress pool on the DSL modemDaddress pool on the provider router
单选题When does the E-series router start monitoring DHCP traffic using the DHCP External function?（）AWhen the discovery packet enters the router from the DHCP client.BOnly when the offer packet enters the router from the DHCP server.CWhen the acknowledge packet enters the router from the DHCP server.DOnly when the discovery packet leaves the router going to the DHCP server.
单选题You have two servers named Server1 and Server2 that run Windows Server 2003 Service Pack 2 (SP2). Server1 is configured as a DHCP server. You plan to decommission the DHCP service on Server1. You need to move the DHCP server configuration to Server2. The configuration must include all configured scopes, leases, and DHCP options. What should you do first? （）AFrom the DHCP snap-in, export list.BFrom the DHCP snap-in, back up the server.CFrom Windows Explorer, copy the %systemroot%/System32/Dhcp/DHCP.mdb file.DFrom Windows Explorer, copy the %systemroot%/System32/Dhcp/backup/dhcpcfg file.
单选题In a Bridged 1483 network, which set of configuration commands allows the router to forward requests from the PC to an external DHCP server at 3.3.3.3?（）Aset dhcp relay 3.3.3.3 set dhcp relay agentBenable dhcp relay agent set dhcp relay agentCset dhcp server 3.3.3.3 enable dhcp relay agentDenable dhcp server 3.3.3.3 enable dhcp relay agent
单选题The ERX Edge Router in your Bridged 1483 network has multiple external DHCP servers configured.During discovery, which algorithm does the router use to decide which DHCP server to send packets to?（）Adirect modeBround robinCweighted round robinDNo algorithm is used.