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单项选择题

What is the MAC address that comes from the multicast address 239.255.0.1?（）

A. 01 - 00 - 5e - 7f - 00 - 01
B. 01 - 01 - ef - ff - 00 - 01
C. 00 - 00 - 00 - 7f - 00 - 01
D. 10 - 00 - ef - ff - 00 - 01

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热门试题

单项选择题Refer to the exhibit. Router RTA has been configured as a DHCP server. The two debug commands will generate output on RTA when Ho st A requests an IP address. Which set of DHCPD debug messages is in the correct sequence?（）

A.DHCPD: Sending DHCPOFFER to client  DHCPD: DHCPDISCOVER received from client  DHCPD: DHCPREQUEST received from client  DHCPD: Sending DHCPACK to client
B.DH CPD: DHCPDISCOVER received from client  DHCPD: DHCPREQUEST received from client  DHCPD: Sending DHCPOFFER to client  DHCPD: Sending DHCPACK to client
C.DHCPD: DHCPDISCOVER received from client  DHCPD: Sending DHCPOFFER to client  DHCPD: DHCPREQUEST received from client  DHCPD: Sending DHCPACK to client
D.DHCPD: DHCPREQUEST received from client  DHCPD: Sending DHCPOFFER to client  DHCPD: DHCPDISCOVER received from client  DHCPD: Sending DHCPACK to client
E.DHCPD: Sending DHCPACK to client  DHCPD: DHCPD ISCOVER received from client  DHCPD: Sending DHCPOFFER to client  DHCPD: DHCPREQUEST received from client
F.DHCPD: DHCPDISCOVER received from client  DHCPD: Sending DHCPACK to client  DHCPD: Sending DHCPOFFER to client  DHCPD: DHCPREQUEST received from client

多项选择题Which two statements are true about IS -IS routing?（）

A. Based on the default timers, OSPF d etects a failure faster than IS - IS does.
B. OSPF default timers permit more tuning than IS - IS does.
C. IS - IS is more efficient than OSPF in the use of CPU resources.
D. OSPF is more scalable than IS - IS because of its ability to identify normal, stub, an d NSSA areas.
E. IS - IS and OSPF are both Open Standard, link - state routing protocols which support VLSM.

多项选择题Refer to the exhibit. A network administrator has configured DHCP services on the router asshown. DHCP clients connected to the FastEthernet0 0 interface are working properly. DHCP clients connected to the FastEthernet0 1 interface are not receiving addresses. Which two statements contain recommendations that will solve the problem?（）

A.The network shown in the output under the ip dhcp pool Central command should be changed to network 10.10.0.0 with a mask of 255.255.255.0
B.A second DHCP pool for network 10 .10.0.0/24 should be configured
C.An ip dhcp excluded - address global configuration command for network 10.10.0.0/24 should be issued
D.The ip helper -address 10.0.0.1 command should be issued so that the address can be added to the Fast Ethernet0/0 c onfiguration
E.The ip helper -address 10.0.0.1 command should be issued so that the address can be added to the Fast Ethernet0/1 configuration

单项选择题Refer to the exhibit. EIGRP had converged in AS 1 when the link between router R1 and R2 went down. The console on router R2 generated the following messages: *Mar 20 12:12:06: %DUAL - 5NBRCHANG E: IP - EIGRP 1: Neighbor 10.1.4.3 (Serial0) is down: stuck in active *Mar 20 12:15:23: %DUAL -3- SIA: Route 10.1.1.0 24 stuck - in - active state in IP - EIGRP 1. Cleaning up The network administrator issued the show ip eigrp topology active command on R2 to check the status of the EIGRP network. Which statement best describes the reason for the error messages?（）

A. Incorrect bandwidth configuration on router R3 prevents R2 from establishing neighbor adjacency.
B. Incorrect bandwidth configuration on router R 5 prevents R2 from establishing neighbor adjacency.
C. Router R3 did not reply to the query about network 10.1.1.0/24 sent by router R2 .
D. Router R5 did not reply to the query about network 10.1.1.0/24 sent by router R2 .

多项选择题A router is running BGP and receives more than one route for a particular prefix. Assume all the routes for this prefix have the same attributes. Which three path features would be reasons be for the rou ter to ignore some of the routes and not consider them as candidates for the best path?（）

A. paths from an internal BGP (iBGP) neighbor if the local autonomous system (AS) appears in the AS_PATH
B. paths for which the NEXT_HOP is inaccess ible
C. paths from an external BGP (eBGP) neighbor if the local autonomous system (AS) appears in the AS_PATH
D. paths for which the NEXT_HOP is accessible
E. paths that are marked as synchronized in the show ip bgp output
F. paths that are marked as  not synchronized in the show ip bgp output