单选题 What is true about Unicast RPF in strict mode?()
It works well with a multihomed environment.
It will inspect IP packets that are encapsulated in tunnels, such as GRE,LT2P,or PPTP.
uRPF is performed within the CEF switching path.
There might be a problem with DHCP as Unicast RPF is blocking packets with a 0.0.0.0 sourceaddress.
单选题 Which statement is true about TCN propagation?()
The originator of the TCN immediately floods this information through the network.
The TCN propagation is a two step process.
A TCN is generated and sent to the root bridge.
The root bridge must flood this information throughout the network.
多选题 Which two options are contained in a VTP subset advertisement?()
followers field
MD5 digest
VLAN information
sequence number
单选题 You are the network administrator of a Layer 3 switched network. Users in one VLAN are complaining thataccess to the server VLAN is very slow from time to time. Traffic in the local VLAN works without any issue,and users in other VLANs do not have any complaint to reach the server VLAN. What is most likely thecause of this issue?()
routing issue
denial-of-service attack
MAC flooding
spanning-tree recalculation
Layer 2 loop
ARP spoofing attack
单选题 Which information will the Cisco IOS command show ip ospf rib display?()
only the local OSPF routes
only the OSPF routes installed in the routing table
only the remotely learned OSPF routes
all the OSPF routes from the OSPF database that are eligible to be put in the routing table
多选题 You are the network administrator of a medium-sized company, and users are complaining that they cannotsend emails to some organizations. During your troubleshooting, you notice that your DNS MX record isblacklisted by several public blacklist filters. After clearing these listings for your IP address, and assumingthat your email server has the right virus protection in place, what are two possible solutions to prevent thisfrom happening in the future?()
Change your Internet provider.
Change your public IP address.
Allow the email server to send traffic only to TCP port 25.
Put your email server in a DMZ.
Use a separate public IP address for your email server only.
单选题 While deploying a new switch, you accidently connect ports 3/12 and 3/18 together, creating a loop. STP detected it and placed port 3/18 in blocking mode. Why did STP not place port 3/12 in blocking mode instead? ()
Port 3/12 was already up and forwarding before the loop was created.
Port priority is based on lowest priority and lowest port number.
You connected the wire on port 3/18 last.
None of the above, it is purely random.
多选题 Which three options are considered in the spanning-tree decision process?()
lowest root bridge ID
lowest path cost to root bridge
lowest sender bridge ID
highest port ID
highest root bridge ID
highest path cost to root bridge
单选题 Based on the exhibit presented. What will be the objective of this route map when applied to traffic passing through a router?()
Take any packet sourced from any address in the 10.2.0.0/16 network or destined to 10.1.14.25 and set the next hop to 10.1.1.1
Take any packet sourced from any address in the 10.2.0.0/16 network and destined to 10.1.14.25 and set the next hop to 10.1.1.1
Nothing; extended access lists are not allowed in route maps used for policy-based routing
Drop any packet sourced from 10.2.0.0/16
单选题 Multicast is being deployed in the network, and only ip pim sparse-dense mode has been configured on allinterfaces in the network to support a new video streaming application. No other multicast configuration wasapplied anywhere in the network. Since enabling multicast, the network monitoring tools show periodic spikes in link utilization throughout the network, even in areas where the video application is not being used.What could be a possible cause?()
PIM sparse mode is being used.
PIM dense mode is being used.
The BGP multicast address family has not been configured.
IGMP version 3 is being used.
IP PIM neighbor filters have not been applied.
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()。