单选题 What is the purpose of the OSPF link-state update packet?（）
describes a change to the OSPF hello timer
carries one or more link-state advertisements
establishes and maintains neighbor relationships
describes the contents of the entire link-state database
多选题 Firewall filters can be used to accept, discard, or reject packets based on （）
protocol type
MAC address
TCP or UDP port
source and destination IP address
单选题 During OSPF adjacency formation, in what state is a router when it is negotiating to be in charge of the database synchronization process?（）
Init
2Way
ExStart
Exchange
单选题 What is the first step in BGP route selection?（）
The local router prefers the route with the shortest as-path.
The router first verifies that it has a route to the bgp Next Hop IP address.
The local router prefers the route from the peer with the lowest peer id address.
The local router prefers the route learned from an ebgp peer over a route learned from an ibgp peer.
单选题 How often are IS-IS Hello packets transmitted?（）
3 seconds for DIS; 9 seconds for non-DIS
9 seconds for DIS; 3 seconds for non-DIS
10 seconds for DIS; 3 seconds for non-DIS
10 seconds for all routers
多选题 What are the three components of the ISO NET address?（）
Area ID
N-selector
System ID
AS number
ISO number
MAC address
多选题 What are two ways that a valid IBGP peering session can be configured?（）
via the accept x.x/y command
via TCP reachable physical interface addresses
via remote loopbacks with the local-address command
via UDP with the neighbor x.x.x.x command at the group level
多选题 What are two purposes of the AS_PATH attribute?（）
route selection
loop avoidance
determining equal cost paths for reachablilty
defining the application of other BGP attributes
单选题 What type of OSPF router is responsible for redistributing routes into OSPF?（）
ABR
ASBR
internal router
backbone router
单选题 Once the TCP connection is established, which message type initiates the BGP peering process?（）
Open
Active
Update
Keepalive
Notification
公文的发文闭合程序？
初始评审的目的是为职业安全健康管理体系建立和实施提供基础，为职业安全健康管理体系的持续改进（ ）。
男性幼儿，4岁，发热、咳脓痰2周。体温波动于38～39℃。X线胸片示右肺下叶大片致密影，右胸膜腔积液。最常见的致病菌是（）
对于PowerPoint2003中文本框内的文字，设置项目符号可以采用的是（）。
牵引装置的分类，可分为（）。
再生资源实行的先征后退工作中，纳税评估如果发现纳税人有异常情况应当及时通报初审的财政机关。
营改增改革试点后，应税服务的增值税优惠政策根据具体形式的不同主要包括哪些方式？
足月新生儿，出生体重2.3kg，羊膜早破，生后2天拒奶，呕吐，发绀，黄疸进行性加重。体检：体温不升，前囟平，颈软，全身黄染，心率150次／分，心音及心率正常，腹软，肝肋下3cm。化验：白细胞20×109/L，中性粒细胞占80%，胆红素308μmol/L，血型“O”，母亲血型为“A”，最大可能是（）
引起肾盂肾炎最常见的致病菌是（ ）。
女性患者，54岁，劳动中突感头晕，随即左半身无力，右眼闭合不全，双眼向左侧凝视，10分钟后昏迷。高热、双瞳孔小、四肢软瘫，应考虑的诊断是（）
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