1月23号新发布的题库中没有一题看到？（选择和拖图）

srtj

战报区有个大连的说他也是1月23号考的，更新的题库中选择和拖图题没有一题考到。。。。真的假的啊。我30号要考试了，好慌。。

aramir9288

Drag the options below unto the planes they operate

Control Plane = Qos
Routing state exchange
Filtering
Data Plane = Establishes telnet sessions
Device access
Data encapsulation
==============================================
Drag and Drop Question on TCP and UDP
TCP : Sends Transmission in Sequence
Transmits packet as stream
Uses a lower transmission rate to ensure reliability
UDP : Uses higher transmission rate to support latency-sensitive apps
Transmists packets individually
Transmissions include an 8-byte header
==============================================
Drag and Drop on Mac addresses
Dynamic mc address : mac that is learned by the switch through normal traffic
Mac ACL : feature that determines whether incoming traffic will be allowed
Mac add table : associates a learned mac add with its connected interface
Mac learning : adding a previously unknown mac into the address tab
Mac aging : removing an inactive mac after a specified time
Static mac: mac address that remains in the mac address table after reboot
==============================================
The PPPoE discovery stage consists of the following steps
PPPoE Active Discovery Initiation (PADI)—The client initiates a session by broadcasting a PADI
packet to the LAN to request a service.
PPPoE Active Discovery Offer (PADO)—Any access concentrator that can provide the service
requested by the client in the PADI packet replies with a PADO packet that contains its own name,
the unicast address of the client, and the service requested. An access concentrator can also use
the PADO packet to offer other services to the client.
PPPoE Active Discovery Request (PADR)—From the PADOs it receives, the client selects one
access concentrator based on its name or the services offered and sends it a PADR packet to
indicate the service or services needed.
PPPoE Active Discovery Session-Confirmation (PADS)—When the selected access concentrator
receives the PADR packet, it accepts or rejects the PPPoE session
PADI ——1
PADO——2
PADR——3
PADS——4
==============================================
wireless lan controller
Dynamic RF Feature Access points auto adjust signal strenght
Easy Deployment Process Controller prvides centralized managmt of users & vlans
Optimized user performance Controller uses loadbalancing to maximize throughput
Easy upgrade process Controller image auto deployed to access Points

srtj

不好意思，网络卡了，发了两次主题。。。

ctfreedom

                               
登录/注册后可看大图

aramir9288

new Drag and drop

difference between Radius and tacacs +

Radius : multi-vendors
UDP
RADIUS combines authentication and authorization
RADIUS encrypts only the password

Tacacs +: proprietary
TCP
Separate AAA
Encrypts the entire body
==========================
e.BGP and i.BGP
+ BGP speaker: a router running BGP
+ BGP peer or BGP neighbor: Any two routers that have formed a TCP connection to exchange BGP
routing information (as BGP runs over TCP on port 179, not UDP)
+ Prefix: Maybe you learned the word “subnet”. In BGP world, it is usually called “prefix” because
BGP usually does not advertise small subnets. It advertises blocks of large subnets so “prefix” is often
used instead
+ Internal BGP (iBGP): refers to the BGP neighbor relationship within the same AS. The iBGP neighbor
does not have to be directly connected
+ External BGP (eBGP): refers to the BGP neighbor relationship between two peers belongs to
different AS. It is recommended that eBGP should be directly connected. Never run an IGP between
eBGP peers
=================================
Bdpu Guard : Disables port when it recieves a BDPU
Bdpu Filter: Drops BDPU messages when recieved
Portfast: Transition to forward state on edge
Uplink fast: Faster transition on non edge ports
Root Guard: Prevents a root port to become a blocking port if necessary
==========================
A. Between DHCP client and servver
1 Discover
2. Offer
3. Request
4. Acknowledgement

B DHCP client itself
1. Initializing(Discover to server)
2. Selecting(from Offer from server)
3. Requesting(Request to server)
4. Binding(from Ack from server)
5. Renewing( from same dhcp server)
6. Rebinding( from different dhcp server)

srtj

aramir9288 发表于 2018-1-26 14:53
Drag the options below unto the planes they operate

Control Plane = Qos

层主威武  这是别人考完后回想写的吗？

aramir9288

y.renhui

谢谢分享

shachia

我更慌 怕看不到題了

zhouy41

good luck！

zhouy41

good luck！

zhouy41

good luck！

zhouy41

good luck！

gmangano

you can do it