单选题 Prior to 802.1w,Cisco implemented a number of proprietary enhancements to 802.1D to improve convergence in a Layer 2 network. Which statement is correct?()
Only UplinkFast and BackboneFast are specified in 802.1w;PortFast must be manually configured.
Only PortFast is specified in 802.1w;UplinkFast and BackboneFast must be manually configured.
None of the proprietary Cisco enhancements are specified in 802.1w.
PortFast,UplinkFast,and BackboneFast are specified in 802.1w.
单选题 Which of these best identifies the types of prefixes a router running BGP will advertise to an EBGP peer?()
prefixes received from any other BGP peer and prefixes locally originated via network statements or redistributed to BGP
all prefixes in its IP routing table
only prefixes received from EBGP peers and prefixes locally originated via network statements or redistributed
only prefixes received from EBGP peers and prefixes received from route reflectors
all prefixes in its routing table except the prefixes received from other EBGP peers
all prefixes in its routing table except the prefixes received from other IBGP peers
单选题 Spanning Tree Protocol calculates path cost based on which of these? ()
interface bandwidth
interface delay
interface bandwidth and delay
hop count
bridge priority
单选题 The ip pim autorp listener command is used to do which of these?()
enable a Cisco router to passively listen to Auto-RP packets without the router actively sending or forwarding any of the packets
allow Auto-RP packets in groups 224.0.1.39 and 224.0.1.40 to be flooded in dense mode out interfaces configured with the ip pim sparse-mode command
enable the use of Auto-RP on a router
configure the router as an Auto-RP mapping agent
单选题 During the IPv6 address resolution, a node sends a neighbor solicitation message in order to discover which of these? ()
The Layer 2 multicast address of the destination node
The solicited node multicast address of the destination node
The Layer 2 address of the destination node based on the destination IPv6 address
The IPv6 address of the destination node based on the destination Layer 2 address
单选题 Which mechanism does OSPFv3 use when the router LSA is too big to be sent out?()
It relies on IPv6 to do the fragmenting.
It splits the LS Update packet into smaller packets.
It splits the LSA into smaller router LSA packets.
It produces an error.
单选题 Which configuration would make an IP SLA probe use a precedence value of 3?()
ip sla 1 icmp-echo 1.1.1.1 tos 12
ip sla 1 icmp-echo 1.1.1.1 tos 96
ip sla 1 icmp-echo 1.1.1.1 precedence 3
ip sla 1 icmp-echo 1.1.1.1 dscp 12
单选题 All of these are fundamental building blocks of differentiated services Traffic Conditioner Block exceptwhich one?()
dropper
classifier
marker
querier
meter
shaper
分模面就是分型面。
分析大堰河的形象及其意义。
简述无线局域网的主要优点及不足之处。
专项维修主要包括()的维修项目。
蚕宝宝是昆虫。
下列关于贝他系数的表述是正确的有()。
每个元音的音质是由()、()、()三个方面的因素决定的。例如“A”是()、()、()音。
急救箱
纽芬兰岛等地的鳕鱼,因被过度捕捞而数量急剧下降。科学家发现,对鳕鱼的过度捕捞改变了鳕鱼的进化过程,导致了鳕鱼的早熟,使其形体变小、品质降低。鳕鱼“被早熟”体现了()①规律是客观的,不可违背②发展是新事物代替旧事物③人为事物的联系是主观的④量变是质变的前提和基础
有关18F-FDGPET/CT恶性淋巴瘤显像征象的解读,正确的是()。