Which two statements about the IS -IS routing protocol are true?（） IS - IS is capable of supporting IPv4 and IPv6.。 IS - IS is only capable of supporting IPv4 and CLNS.。 IS - IS routers use ES - IS hellos (ESH) to establish and to maintain neighbor relationships.。 IS - IS routers run the Bellman - Ford algorithm against their LSDBs to pick the best paths.。 Level 1 routers learn about paths within the area of which they are a part.。 Level 2 routers learn about paths both within areas and between areas.。
英格兰的技术发明在17-18世纪之交已经蓬勃发展，先后出现了铁匠兼锁匠纽卡门的蒸汽机，制铁人达比解决高炉冶铁燃料问题的炼焦炉等。1733年技工凯伊发明了飞梭，同年木工怀亚特发明了第一台纺纱机。1765年，钟表匠哈格里夫斯发明了珍妮纺纱机。这一现象说明（）。 工业革命促进社会生产。 科学理论带来技术发明。 教育发展推动文化普及。 技术发明源于生产实践。
Switch 1 was configured as shown below： Based on the output shown above， which statement is true？（） IP traffic matching access list is forwarded through VLANs 5-10.。 All VLAN traffic in VLANs 5-10 that match access list will be forwarded， and all else will be dropped.。 IP traffic matching VLAN list 5-10 will be forwarded， and all other traffic will be dropped.。 All VLAN traffic matching VLAN list 5-10 will be forwarded， and all traffic matching access list is dropped.。 None of the other alternatives apply。
（）是人的心理活动的源泉。 感知觉。 内心世界。 认识过程。 客观现实。
专用FTP服务器与匿名服务器的主要区别是什么？
下列促进健康的原则陈述正确的是（）。
