which address range efficiently summarizes the routing table of the addresses for router main?() A.172.16.0.0/18B.172.16.0.0/16C.172.16.0.0/20D.172.16.0.0/21
which address range efficiently summarizes the routing table of the addresses for router main?()
A.172.16.0.0/18
B.172.16.0.0/16
C.172.16.0.0/20
D.172.16.0.0/21
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阅读下面的短文，回答问题 [When an IP packet arrives at a router, generally the router looks at the destination address of the packet, and forwards the packet to one of its network interfaces. The forwarding decision is usually done by looking up the destination address from another data structure called a forwarding table. The forwarding table is created by the router using the routing table and possible routing policies existing in the router. The router then creates a table where it lists which networks are accessible through which of the routers network interfaces. An IP router looks at every IP packet individually and does the forwarding decision on a packet-by-packet basis. If something changes in the routers routing table, a packet can take a different route from a preceding packet even if it has the same destination.] From the paragraph above，we can see that the router （ ） a forwarding table according to the routing table and possible routing policies existing in the router. When an IP packet arrives at a router, the （ ） part of packet is normally checked by the router. An IP router checks every IP Packet individually and makes the forwarding decision based on （ ）.A．is generating B．generate C．is generated D．generates A．forwarding table B．network interfaces C．routing policies D．destination address A．the destination address and network interfaces B．forwarding table and network interfaces C．the destination address and forward table D．routing policies and routing table
Router VE1 has just received a packet and needs to route it. What two actions must this router take in order to route incoming packets? (Choose two)A. Inspect the routing table to select the best path to the destination network addresses.B. Validate sources of routing information.C. Inspect the ARP table to verify a legitimate source MAC address for each packet.D. Identify the destination network address of each packet.E. Verify the receipt of routed packets by the next hop router.F. Identify the source network address of each packet.
Given the IP address range 192.168.100.0 through 192.168.100.255, which network mask segments these addresses into 16 subnets?() A.255.255.255.224B.255.255.255.240C.255.255.255.248D.255.255.255.252
What is the reason for configuring a passive interface on a router?() A. Allows interfaces to share common IP addresses.B. Allows an interface to remain up without the aid of keepalives.C. Allows a router to send routing and not receive updates via that interface.D. Allows a routing protocol to forward updates that is missing its IP address.E. Allows a router to receive routing updates on an interface but not send updates via that interface.
What will happen if a private IP address is assigned to a public interface connected to an ISP?() A. Addresses in a private range will be not routed on the Internet backbone.B. Only the ISP router will have the capability to access the public network.C. The NAT process will be used to translate this address in a valid IP address.D. Several automated methods will be necessary on the private network.E. A conflict of IP addresses happens, because other public routers can use the same range.
A router uses its () to detemine where to forward the packets.A．domain name B．MAC address C．Frame ID D．routing table
Anytime a host or a router has an IP datagram to send to another host or router, it has the（ ）address of the receiver. This address is obtained from the DNS if the sender is the host or it is found in a routing table if the sender is a router. But the IP data gram must be（ ） in a frame to be able to pass through the physical network. This means that the sender needs the （ ）address of the receiver. The host or the router sends an ARP query packet. The packet includes the physical and IP addresses of the sender and the IP address of the receiver. Because the sender does not know the physical address of the receiver, the query is（ ） over the network.Every host or router on the network receives and processes the ARP query packet, but only the intended recipient recognizes its IP address and sends back an ARP response packet.The response packet contains the recipient's IP and physical addresses. The packet is（请作答此空） directly to the inquirer by using the physical address received in the query packet. A. multicastB. unicastC. broadcastD. multiple unicast
What are the "bound IP addresses" used for in LDP？（）A、For each such address and mask /32, one label binding is created.B、As the TCP endpoint, IP addresses are used by the LDP session.C、These addresses are used to find the label binding to put in the LFIB, by looking up these IP addresses in the routing table.D、These addresses are used for penultimate hop popping (PHP) when forwarding packets to the next router directly.
A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24/29. which statement explains the reason for this issue？（）A、The address is abroadcast address.B、The Ehernet interface is faulty.C、VLSM-capable routing protocols must be enable first on the router.D、This address is a network address.
What does the ip access-routes configuration command accomplish?（）A、It statically places a host route in the routing table.B、It statically associates an IP address with a customer.C、It dynamically creates a host route in the routing table.D、It dynamically assigns an address to the router's interface
What will happen if a private IP address is assigned to a public interface connected to an ISP?（）A、Addresses in a private range will be not routed on the Internet backbone.B、Only the ISP router will have the capability to access the public network.C、The NAT process will be used to translate this address in a valid IP address.D、Several automated methods will be necessary on the private network.E、A conflict of IP addresses happens, because other public routers can use the same range.
A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24/29.which statement explains the reason for this issue?（）A、The address is a broadcast addressB、The Ehernet interface is faultyC、VLSM-capable routing protocols must be enable first on the router.D、This address is a network address.
which address range efficiently summarizes the routing table of the addresses for router main?（）A、172.16.0.0/18B、172.16.0.0/16C、172.16.0.0/20D、172.16.0.0/21
What is the reason for configuring a passive interface on a router?（）A、Allows interfaces to share common IP addresses.B、Allows an interface to remain up without the aid of keepalives.C、Allows a router to send routing and not receive updates via that interface.D、Allows a routing protocol to forward updates that is missing its IP address.E、Allows a router to receive routing updates on an interface but not send updates via that interface.
Which destination addresses will be used by Host A to send data to Host C?（）A、the IP address of Switch 1B、the MAC address of Switch 1C、the IP address of Host CD、the MAC address of Host CE、the IP address of the router's E0 interfaceF、the MAC address of the router's E0 interface
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.
Given the IP address range 192.168.100.0 through 192.168.100.255, which network mask segments these addresses into 16 subnets?（）A、255.255.255.224B、255.255.255.240C、255.255.255.248D、255.255.255.252
You are a systems engineer for your company. Your company has 20，000 users in a large campus environment located in Los Angeles. Each department in the company is located in its own building. Each department has its own IT staff， which is responsible for all network administration within the building. The company’s network is divided into several IP subnets that are connected to one another by using dedicated routers. Each building on the company’s main campus contains at least one subnet， and possibly up to five subnets. Each building has at least one router. All routers use RIP version 2 （RIPv2） broadcasts. The company acquires a new business unit located in Denver. The Denver office has 25 users. The network in the Denver office is connected to the network at the main campus by using a leased frame relay connection. The network administrator at the Denver office installs a Windows Server 2003 computer and configures Routing and Remote Access on this server. The network administrator at the Denver office configures this server as a router and implements RIPv2 in Routing and Remote Access. Later， the Denver administrator reports that his router is not receiving routing table updates from the routers on the main campus network. He must manually add routing entries to the routing table to enable connectivity between the locations. You investigate and discover that the RIPv2 broadcasts are not being received at the Denver office. You also discover that no routing table announcements from the Denver office are being received on the main campus network. You need to ensure that the network in the Denver office can communicate with the main campus network and can send and receive automatic routing table updates as network conditions change. What should you do on the router in the Denver office？（）A、 Configure the router to use RIPv1 broadcasts.B、 Configure the router to use auto-static update mode.C、 Add the IP address ranges of the main campus network to the router’s Accept list and Announce list.D、 Add the IP addresses of the main campus routers to the router’s Neighbors list.
单选题which address range efficiently summarizes the routing table of the addresses for router main?（）A172.16.0.0/18B172.16.0.0/16C172.16.0.0/20D172.16.0.0/21
单选题Your company uses DHCP to lease IPv4 addresses to computers at the main office.A WAN link connects the main office to a branch office. All computers in the branch office are configured with static IP addresses. The branch office does not use DHCP and uses a different subnet. You need to ensure that the portable computers can connect to network resources at the main office and the branch office.How should you configure each portable computer？（）AUse as tatic IPv4 address in the range used at the branch office.BUse an alternate configuration that contains a staticI Paddress in the range used at the main office.CUse the address that was assigned by the DHCP server as astatic IP address.DUse an alternate configuration that contains a staticI Paddress in the range used at the branch office.
单选题Your company uses DHCP to lease IPv4 addresses to computers at the main office. A WAN link connects the main office to a branch office. All computers in the branch office are configured with static IP addresses. The branch office does not use DHCP and uses a different subnet. You need to ensure that the portable computers can connect to network resources at the main office and the branch office. How should you configure each portable computer？（）AUse a static IPv4 address in the range used at the branch office.BUse an alternate configureation that contains a static IP address in the range used at the main officeCUse the address that was assigned by DHCP as a static IP addressDUse an alternate configuration that contains a static Ip address in the range used at the branch office.
单选题What does the ip access-routes configuration command accomplish?（）AIt statically places a host route in the routing table.BIt statically associates an IP address with a customer.CIt dynamically creates a host route in the routing table.DIt dynamically assigns an address to the router's interface
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Your company uses DHCP to lease IPv4 addresses to computers at the main office. A WAN link connects the main office to a branch office. All computers in the branch office are configured with static IP addresses. The branch office does not use DHCP and uses a different subnet. You need to ensure that the portable computers can connect to network resources at the main office and the branch office.How should you configure each portable computer（）？AUse a static IPv4 address in the range used at the branch office.BUse an alternate configuration that contains a static IP address in the range used at the main office.CUse the address that was assigned by the DHCP server as a static IP address.DUse an alternate configuration that contains a static IP address in the range used at the branch office.
多选题Which destination addresses will be used by Host A to send data to Host C?（）Athe IP address of Switch 1Bthe MAC address of Switch 1Cthe IP address of Host CDthe MAC address of Host CEthe IP address of the router's E0 interfaceFthe MAC address of the router's E0 interface
单选题A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24/29.which statement explains the reason for this issue?（）AThe address is a broadcast addressBThe Ehernet interface is faultyCVLSM-capable routing protocols must be enable first on the router.DThis address is a network address.
单选题What are the "bound IP addresses" used for in LDP？（）AFor each such address and mask /32, one label binding is created.BAs the TCP endpoint, IP addresses are used by the LDP session.CThese addresses are used to find the label binding to put in the LFIB, by looking up these IP addresses in the routing table.DThese addresses are used for penultimate hop popping (PHP) when forwarding packets to the next router directly.