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access. Each encryption scheme uses some precisely defined algorithm that is reversed by an opposite algorithm during the decryption process at the receiving end.
AAL3/4 ATM Adaptation Layer 3/4 One of the four AALs recommended by ITU-T , supporting connection-oriented and also support
A method of transmitting a parity bit or word in the link overhead of a previous block or frame. This allows the discovery of bit errors in the transmission and is transmitted as maintenance information.
B(config-if)#ip nat outside configure S1 interface for the outside network to specify which hosts can NAT
EGPs: External Gateway Routing Protocol , Maintaining Routes between Autonomous Systems
ANSI American National Standards Institute (American National Standards Institute) by the United States, government
To understanding
A: 10.0.0.0/8
The clock frequency Serial1 is up, the line protocol is up interface is working properly.
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0x2 Router will load the Flash in the IOS software . (Default config regcode)
A method is generally defined to track the network layer ( layer 3 ) address to the data link layer ( layer 2 ) address. See
Routing methods. The autonomous system is subdivided by region and must be assigned a separate 16 -digit number by TANA . See area .
EPROM erasable programmable read-only memory-----
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Provide timing.
CHAP Q & A Handshake Authentication Protocol (Challenge Handshake Authentication Protocol) -----
Basic FRAME-RELAY configuration
VTP is the use multicasting to advertise, VTP will intervals . 5 minutes announcement once , even if there is no change .VTP switch synchronized the last configuration .
De discard Eligibility is used in the Frame Relay network to tell the switch if the switch is too
Encapsulation ( encapsulation ) layered association, the technology used, one layer to the upper layer protocol data unit
Apply application related configuration
Floating routes ( floating routers ) are used along with dynamic routing to provide backup routes to prevent failure.
login set login password when
" The main explanation is D , E vocabulary beginning.
ROM: Rom monitor is a lower-level os system than Mini IOS , similar to BIOS Mini IOS (2500 serial
NET / ADAPTIVE company in I991 co-founded the international organization, the organization for the development and promotion of the ATM standards-based technology implementation of the agreement. The ATM Forum relaxed the official standards developed by ANSI and ITU.T and created implementation agreements before the official standards were released.
The proposed circuit link. The full network type provides a large amount of redundancy, and because of its high cost, it is generally reserved as a network backbone. See
A (config) #inte s 1 enters s 1 interface
A Cisco hierarchical network. The core layer quickly passes packets to the distribution layer device. No packet filtering is performed at this level.
OSPF open protocol , is link-state type routing protocol .
1OOBaseT is based on the IEEE 802.3U standard, 1OOBaseT is a baseband fast Ethernet using UTP wiring
Configure ACL to reject london to access Denver
The area of the possibility of being discarded. Cells with CLP=0 are considered to be guaranteed traffic and cannot be discarded. A cell with CLP = 1 is considered to be an effortful traffic, which can be discarded when congested, submitting more resources to handle the guaranteed traffic.
" The main explanation is D , E vocabulary beginning.
An example. Also known as " narrowband " . For broadband .
Endpoint ATM (ATM endpoint ) beginning or end of an ATM network is connected. ATM endpoints include
Please refer to the second part of the CCNA Professional English Vocabulary Collection : Classic Recommendations ; CCNA Professional English Vocabulary Collection
B(config)#ip nat inside source list 1 interface serial 1 overload
100BaseTX is based on the IEEE 802.3U standard, 100BaseTX is wired using two pairs of UTP or STP
nvRam : Startup-config startup configuration file , or user profile
1.544Mb/s . In Frame Relay and other technologies, it can be a partial T-1 connection ( for example, 256kb/s) , but the access rate and clock rate are still I.544Mb/S.
R6(config)#interface ethernet 0
flat network ( plane Network ) a large and a large collision domain network broadcast domains.
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Distance vector routing protocol:
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System Autonomous ( AS ) refer to the AS .
1Gbps 4
Part of the computer sends data to another part.
The router of the DCE needs to configure the clock frequency.
The fixed length enables cells to be processed and exchanged in hardware at high rates, making this technology the basis for ATM and other high-speed network protocols. See cell .
Data rate between 622Mb/s and higher. See BRI , ISDN, and PRI .
Medium, indicating the beginning and end of each character. Compare isochronous transmission .
AS path prepending (AS path pre-planned ) use route maps by adding fake ASN extended from
the alignmentError ( alignment error ) Ethernet The error occurring in the network, the received frame in which the additional
When configuring IGRP , you need to pay attention to the autonomous system number .
Autonomous system :
Layer and Transport layer .
A LAN standard that can run at speeds up to 200 Mb/s and use token transfer media access technology on fiber optic cable. For redundancy, a double loop structure can be used.
Count to infinity ( calculation to infinity ) routing problem in a routing algorithm, routers continue to increase
Router rip selection rip as the routing protocol
ELAN emulation LAN (emulated LAN) emulates Ethernet or commands using a client / server model
AS AS (autonomous system) a group of networks under the management of another, they share the same
B8ZS binary 8 replacement - a line coding, explained at the far end of the connection, when transmitting eight zeros continuously on the link of the T-1 and E-1 circuits, it uses a special Code replacement. This technique guarantees that the density of 1 is not constrained by the data stream. Also known as bipolar 8 zero replacement. Compare AMI . See ones density .
Exit application and exit the database configuration mode of the VLAN
Configure IP protocol R14(config)#interface bri 0 R14(config-if)#ip address negotiated
1. Control network traffic 2. Implement packet filtering
R14(config)#isdn switch-type basic-net3
interface fastethernet 0/1 enter fa0 / 1 interface
The technology of connecting bandwidth on a line to allocate bandwidth. See TDM , ATDM, and statistical multiplexing .
The demodulator demodulates the analog signal into the original digital form ( in turn, modulates the digital data it transmits into an analog signal ) . See modulation .
The higher the RouteID, the easier it becomes to become a DR (Designated Router designated router )
Sended and is not reliable. Compare connection-oriented . See virtual circuit .
Spanning trees can avoid loop problems caused by redundancy . Solve the problem : put redundant ports into blocking state . Interfaces in blocking state will not receive / send user data .
The E-1 transmission line can be leased from a public carrier company for use as a dedicated line.
Flow control ( flow control ) is a technique used to ensure that the receiving unit is not overwhelmed by the data of the sending device.
VTP has three modes :
Medium, indicating the beginning and end of each character. Compare isochronous transmission .
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A(config-keychain)#key 1Configure key 1 A(config-keychain-key)#key-string cisco define password A(config-keychain-key)#exit
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The process of outputting a single stream. See multiplexing .
A random value selected by the BGP router when sending an OPEN message.
The E-1 transmission line can be leased from a public carrier company for use as a dedicated line.
Set vtp line password (Telnet) line vty 0 ?
The designated router is in case of failure.
Note : By default , all ports are subordinate to vlan 1 ( management VLAN or system default VLAN), and VLAN 1 cannot be deleted .
Set the dial number R14(config)#interface bri 0
Action : Permit
all-routes explorer packet ( full routing packet detection ) a can pass over the entire SRB sounding packet network,
Track all possible paths to a given destination. Also known as a full ring detection package. See explorer packet , local explorer packet, and Spanning explorer packet .
=========================================================== =============== HDLC:
A bit set by the network that informs the DTE receiver that congestion is encountered along the path from the source to the destination. Received FECN bit
De-encapsulation ( disassembly ) layered protocol technology, in which a layer of slave layer protocol data unit
Interface serial 0
1. Transmission area ( backbone area ) 2. Common area ( non-backbone area )
UDP ( User Message Protocol ), no connection , no retransmission mechanism , unreliable transmission
CISCO router , the serial interface defaults cisco HDLC encapsulation in practical applications , Cisco HDLC incompatible standard hdlc.
(Amplitude magnitude ) the maximum analog or digital waveform.
FDM frequency division multiplexing (Frequency-Division Multiplexing) allows several channels to the channel
A(config)#key chain A configuration key chain A
buffer ( Buffer ) designed to store data processed in the transmission. Buffer for receiving / storage
Ripv2 is a multicast method to advertise the network , multicast address : 224.0.0.9 router rip
Show ip ospf interface serial 1 View the process ID of RouterID and OSPF and the associated network type . show ip protocols
A logical collection of information. IP datagrams have become the main unit of information for the Internet. In the OSI layers reference model, the term cell (Cell) , frame (Frame) , the message (message) and the segment (segment) also define these logical information groupings.
1. Bandwidth 2. Delay 3. Reliability 4. Load 5. MTU
The requested VCC determines the likelihood of a path containing the appropriate bandwidth.
Frame Relay switching ( Frame Relay switching ) service provider router frame relay packets provided
Address learnmng ( address learning ) is used with the transparent bridge to learn the hard of all devices on the internet.
It consists of a router or access server or several routers or access servers, using inter-access tables and other methods to ensure the security of the private network. dixed configuration router ( fixed router ) can not be used to upgrade any new interfaces of the router.
1Gbps 4
ABR area border router ----- located in one or more OSPF area boundary OSPF routers, ABR is used to OSPF connection region to the OSPF backbone area
Distance vector routing protocol:
The level is set to 32768 .
1OOBaseT is based on the IEEE 802.3U standard, 1OOBaseT is a baseband fast Ethernet using UTP wiring
Basic FRAME-RELAY configuration
Ethernet cable type for switch or switch to hub.
AARP AppleTalk Address Resolution Protocol This protocol in the AppleTalk stack maps the data link address
autonomous confederation ( Autonomous Federation ) rely mainly on their own network reachability and routing information
There is a command line interface function.
HUB Hub : A broadcast domain, a collision domain. Flooding forwarding . Shared bandwidth . Straight line : the host and switch or HUB connected
Rip V1 uses broadcast announcement broadcast address : 255.255.255.255
Fast Ethernet ( Fast Ethernet ) ---- speed lOOMb / s Ethernet specification. Fast Ethernet ratio
Network connection.
Ip route 4.0.0.0 255.0.0.0 s0
1Gbps 4
Ppp authentication CHAP chooses to use CHAP for authentication [chap | pap] debug ppp authentication to debug PPP authentication .
Guide IOS and how to configure it.
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Medium, indicating the beginning and end of each character. Compare isochronous transmission .
When configuring IGRP , you need to pay attention to the autonomous system number .
An interface processor used by the device to provide two lOOMb/s lOOBaseT ports.
Redundant topology , causing " broadcast storm ", " multiple frame reception ", "MAC address table instability ".
Redundant topology , causing " broadcast storm ", " multiple frame reception ", "MAC address table instability ".
AARPprobepackets (AARP probe packets ) AARP packets sent, for determining a non-extended
extended IP accesslist ( extended IP access list ) by logical address, the network layer protocol header word
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Part of the computer sends data to another part.
distance-vector routing algorithm ( Distance Vector Routing Algorithm ) In order to find the shortest path,
Numbered recommended standards in ISDN , SMDS, and BISDN . 2) A flag for the field in the ATM address containing the E.164 format number .
RA:
The BPDU is exchanged between switches every two seconds. Periodic.
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Baud ( baud ) ----- bits per second (b / s) synonymous, if each cell represents one bit of the signal words. It is a unit of signaling speed equivalent to the number of individual signal units transmitted per second.
Node group. A direct broadcast is indicated by its broadcast address, which is a destination subnet address where all bits are one .
Layer Access ( Access Stratum ) ----- the Cisco three-layer hierarchical model. The access layer allows users to access the Internet.
A(config-if)#ip rip authentication mode md5 ciphertext authentication
CPE customer premises equipment is installed at the user's location and connected to the telephone company's network equipment, such as telephones,
Maximize the specification of running IP OVer ATV . Also known as "CIA" .
Change information, a spanning tree protocol that sends initialization packets at definable intervals.
Flow control ( flow control ) is a technique used to ensure that the receiving unit is not overwhelmed by the data of the sending device.
Partial mesh
ACL two actions :
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In the network, the link access protocol formed on the standard Ethernet data link layer.
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data direct VCC ( data direct VCC) ATM two LEG to establish a two-way point between the
VLAN characteristics
Reliable transmission mainly involves physical addressing, line procedures, network topology, error notification, orderly delivery of frames, and flow control. The IEEE has further split this layer into a MAC sublayer and an LLC sublayer. Also known as the link layer. Can be compared to the data link control layer of the SNA model. See Application layer , LLC , MAC , Network layer , Physical
Show frame-relay lmi show frame-relay pvc show frame-relay map
ETP Ethernet Interface Processor, a Cisco 7000 Series Router
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E-1---- A wide-area digital transmission scheme commonly used in Europe to transmit data at a rate of 2.048 Mb/s .
Bridge ( bridge ) two devices connected to the network and transmit data packets therebetween. Both paragraphs must use the same
IGRP is a distance vector type routing protocol that does automatic route summarization . There is no way to turn off this feature .
switchport access vlan 10 Add this port to 10 VLAN in .
Negotiation.
Private IP address :
VLAN features :
Class C network (C -based network ) portion of the Internet Protocol hierarchical addressing scheme. Class C network has 24
floodming ( diffusion ) an interface when receiving traffic it will be transmitted to the originating communication interfaces in addition to the amount of
ATM Forum (ATM Forum ) ----- by the Northern Telecom , Sprint , the Cisco Systems and
PAP: Two handshakes , the password is transmitted in clear text.
4. Notification method : Broadcast (RIPv1, IGRP) rule mechanism :
Programmable after shipment, these non-volatile memory chips can be wiped off and reprogrammed with high power light when needed. See EEPROM and PROM .
Private IP address :
Data Link layer ( data link layer ) the OSI of the reference model 2 layer which ensures that data across the physical link
Interface serial 0
For broadcast frames and multicast data frames , the switch forwards flooding by default.
Encapsulation frame-relay
EIGRP see Enhanced IGRP .
Network 192.168.1.0 0.0.0.255 area 0
ABR area border router ----- located in one or more OSPF area boundary OSPF routers, ABR is used to OSPF connection region to the OSPF backbone area
Show ip route eigrp to see the best route for all EIGRP ( stored in the routing table )
Each network elects a root bridge BridgeID Lowest
Class A network (A Class network ) portion of the Internet Protocol hierarchical addressing scheme. Class A network only
Autonomous system :
No port is activated with the no shutdown command
Source : 10.3.3.1
Configure IP protocol R14(config)#interface bri 0 R14(config-if)#ip address negotiated
Cisco layered network. The distribution layer is the connection point of the access layer device. Routing is done at this level.
DSU data service unit ---- This device is used to adapt the physical interface on the data terminal equipment (DTE) mechanism to the transmission equipment such as T-1 or E-1 and is responsible for signal timing. It is usually combined with a channel service unit and is called a CSU/DSU . See CSU .
A service-related sublayer of the AAL ATM adaptation layer data link layer, data link layer from other applications
2. Different VLANs cannot communicate directly .
Binding ( binding ) in LAN configuration on a network layer protocol to use some type of frame
ACR allows the Cell Rate ATM Forum to be a name defined for managing ATM traffic. Congestion control
buffer ( Buffer ) designed to store data processed in the transmission. Buffer for receiving / storage
Is a point-to-multipoint connection. See control directVCC .
OSPF open protocol , is link-state type routing protocol .
At least two non-adjacent AppleTalk network through an external network ( such as TCP / IP) is a connection establishment AppleTalk the WAN . This connection is called an AURP tunnel. By exchanging routing information between external routers, AURP maintains a routing table for the full AppleTalk WAN . See AURP tunneL .
Password cisco sets a password to "cisco"
1. Content of the announcement : Incremental update (OSPF lsa) 2. Announcement time : Trigger 3. Announced object : Router with neighbor relationship
B(config)#access-list 1 permit any
LMI: Local Management Interface .
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analog transmission ( analog transmission ) represented by different combinations of the information signal amplitude, frequency and phase
PPP configuration
An octet divided into four points, followed by a forward slash and the number of the masked bit ( abbreviation of the subnet symbol ) . See
Virtual circuits in the network.
Network *.*.*.* declares the interface declaration interface :
At least two non-adjacent AppleTalk network through an external network ( such as TCP / IP) is a connection establishment AppleTalk the WAN . This connection is called an AURP tunnel. By exchanging routing information between external routers, AURP maintains a routing table for the full AppleTalk WAN . See AURP tunneL .
ACL is the most important : The ACL condition list will have a condition of hiding " reject all " at the end .
FRAD Frame Relay access device (Frame Relay access device) to provide LAN and Frame Relay WAN
AAL5 ATM Adaptation Layer 5 One of the four AALs recommended by ITU-T , mainly used to support inter-face connection
Access-list 1 deny host 10.3.3.1 access-list 1 permit any
Physical layer : rate , voltage , pin interface type Bit
Caused by simultaneous transmission of the network segment. Its appearance may exhaust the network bandwidth and cause a timeout.
VLAN characteristics
cell payload scrambling ( cell payload scrambling ) the ATM switches and certain of the edges speed relay
Routing on ISDN or telephone lines.
Address mapping ( address mapping ) by converting a network address from one format to another, this
Interface serial 0
Bandwith on demand (BoD , bandwidth on demand ) This feature allows an additional B channel to be used for
Duplex Auto ( automatic duplex ) of a layer and 2 a device layer disposed on, it automatically switches provided
Reduce the send rate.
The twisted pair transmission distance is 100 meters .
block size ( block size ) available hosts in a subnet. The block size can generally be in increments of 4 , 8 ,
For broadcast frames and multicast data frames , the switch forwards flooding by default.
Interface s 1 no ip add
The over rate is the maximum rate minus the insurance rate. Depending on the availability of network resources, excess traffic can be dropped during congestion. Contrast maximumraten
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CCIE Security LAB Dumps
Exam Code: TS：TS1、TS2、TS3、TS3+、TS3++
CFG ：LAB1
DIAG：DIAG1、DIAG2、DIA2+、DIAG2++、DIAG2+++
Certification Provider: CiscoCisco
Certification Exam Name:CCIE Security LAB
Update Date: Apr 22,2024
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