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98 Cards in this Set
- Front
- Back
distance vector default max metric is?
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15 hops
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what is a supernet route?
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ip classless only.
10.0.0.0/8 is the supernet route of 10.10.0.0/16 |
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ip classless is the default after what IOS version
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11.3
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classful router will drop packet destinted for a network not explictly in its routing table
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true
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command to set ip classless
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config#ip classless
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3 features used to enhance the stability of IGRP
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holddown timer
split horizon posion reverse updates |
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IGRP detects a down neighbor by
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the lack of updates
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IGRP
Timers & Time variable |
update timer-90sec
invalid timer-3x the update time holddown timer-3x update + 10sec flush timer- 7x update timer |
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what distance vector route protocols dont support VLSM
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RIP v1
IGRP |
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IP as a method of delivery is?
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unreliable method and is best effort.
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icmp is the component of the __________ protocol stack.
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TCP/IP
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icmp doesnt provide reliablity.
Reliability is provided by the ______ _____ ________ |
upper layers protocols
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ICMP is at what layer of TCP/IP protocol stack
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internet
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IETF
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internet engineering task force
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when does a router go into setup mode? 3 choose
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#setup
initial conf after deleting backup conf |
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#show version
shows (3 things) |
last restart method
config register settings located where IOS loaded |
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command to see active IOS (choose two)
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#show flash
#show version |
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an interface description should have (2 things)
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circuit number
location and purpose |
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what are the osi layer 4 protocols
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tcp, udp, spx
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osi layer 2. whats its purpose and do?
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data link layer.
*error dection and error recovery combination of bits into bytes mac address |
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osi layer 6 protocol example
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compression, encryption, jpeg, ascii, ebdic
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what is PDU
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protocol data unit
represents the bits that include headers and trailers & encapsulated data |
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Describe the Layers of the TCP/IP Architecture
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application
transport internet network access |
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osi layer 3 protocol example
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network layer
ip ipx |
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name osi model layers
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application
presentation session transport network data link physical |
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give example of protocols for each layer of the tcp/ip archiectture.
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application-http, pop3, smtp
transport-tcp, udp internet-ip, network access- ethernet, frame relay |
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What does the TCP/IP Application layer do?
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Provides the interface between the software running on the computer and the network itself.
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What is an example of an OSI Layer 1 protocol?f
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EIA/TIA-232, v.35
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What is the 5 step TCP/IP |Data Encapsulation process?
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1. Create the application data and headers
2. Package the data for transport. 3. Add the destination and source network layer address to the data 4. Add the destination and source data link layer address to the data 5. Transmit the bits |
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What is layer 4 of the OSI model? What is it's main purpose?
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*Transport
*Reliable or unreliable delivery *Multiplexing |
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What command enables CDP on the interface of a router.
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Router(config-if)# cdp enable
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Transmitting type length values (TLVs) inside advertisements is a process used by CDP to provide information about neighboring devices. What information is displayed by these TLVs? (Choose three.)
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interface info for connected device
name of device holdtime 4 ads |
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command to see cdp info on connected deviced\s
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#show cdp neighbors
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For which three network layer protocols does CDP provide information? (Choose three.)
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IP, IPX, APPLETALK
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when in a telnet session if it is suspended and u hit enter what happens
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session is resumed
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telnet terminates after ___mins of inactivity
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10min
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Which of the following can be configured as a source for the IOS image by using the boot system command? (Choose two.)
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tftp server
flash memory |
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An IOS image can be copied into flash from a TFTP server. Which of the following statements are true regarding this process? (Choose three.)
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-series of !'s are displayed
-after flash downld its verified -series of e's displayed as current IOS erased. |
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What command can be used in ROM monitor mode to run the IOS image in flash?
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rommon1> boot flash: filename
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boot system commands saved in?
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NVRAM
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what is the sequence to load the IOS boot system statements.
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NVRAM
FLASH TFTP ROM (rommon) |
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command to set boot system startup configuration statement from flash
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conf#boot system flash IOS_filename
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command to set boot system startup configuration statement from tftp
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conf#boot system tftp IOS_filename server_ip_address
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command to set boot system startup configuration statement from rommon
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conf#boot system rom
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command syntax
vertical bars (|) |
serperate alternative, elements
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command syntax
square brackets [] |
indicate optinal elements
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command syntax
braces {} |
indicate a required choice
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command syntax
braces within brackets [{}] |
indictae a required choice within an optional elemenet
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command syntax
boldface |
indicates commands entered literally as shown
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command syntax
Italics |
means you supply the actual value
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config registry
what does this boot to 0x2100- 0x2101 0x2107 |
0-boots to ROM Monitor mode (RX BOOT)
1-router boots from IOS in ROM any- router will first look in flash for IOS |
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what does the config resgister do
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it determines the location of thesouce files to boot the router
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boot system rom
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instructs router to boot from rom
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SMTP port & pro
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25
tcp |
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SNMP port and pro
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161
udp |
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Network Protocol - HDLC
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(High Level Data Link Control Protocol) Specifies encapsulation for (High Level Data Link Control Protocol) Specifies encapsulation for synchronous serial data links using bit-orientated framing
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synchronous
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even
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csma/cd
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carrier sense multiple access with collision detection
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Lenght
100baseFX 1000baseCX 1000baseSX 1000baseLX |
100baseFX-400meters
1000baseCX- 25 meters 1000baseSX- 260 meters 1000baseLX- 3-10 meters |
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gbic
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Gigabit Interface Converter is a hot-swappable I/O device that plugs into a Gigabit Ethernet port. A key benefit of using a GBIC is that it is interchangeable. This allows users the flexibility to deploy other 1000Base-X technology without having the need to change the physical interface or model on the router or switch. GBIC support UTP and fiber media for gigabit Ethernet transmissions.
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unicast
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Frame sent from one device to a single destination
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broadcast
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Frame sent from one device to all other connected devices or addresses
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multicast
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Frame sent from one device to a specific group of devices
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what do switches do
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divide network segments to reduce the number fo devices competeing for bandwidth
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What do distance vector algorithms require each router in the network to send?
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the entire routing table to each neighboring router
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What happens to a static route entry in a routing table when the outgoing interface is not available?
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The route is removed from the table
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When a routing table update is received by a router in a distance vector network, which of the following occurs
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The hop count metrics for the enclosed routes are incremented
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How would an administrator configure a static route for use if a primary route failed?
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configure the route with an administrative distance greater than the default value
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Which command will display the source of the system boot image?
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#show version
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what can be gained from the IOS image filename? 3 things
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software version
hardware platform |
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configuration register setting of 0x2102 indicate on a router?
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tells the router to look in the startup config for boot system commands
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router startup sequence
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rom-bootstrap
flash, tftp, rom-locate and load IOS nvram,tftp,console-locate and load config file or enter startup |
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boot system commands saved in
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NVRAM
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stores a subset IOS image and can be booted
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ROM
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the order in which router looks for IOS images to load depends on the boot field setting in the
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config register
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command to modilfy config register
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#conf t
#config-register 0x210x |
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0x2100
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ROM mon
use "b" or "boot" command to boot the system |
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0x2101
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automatically boot from ROM (boots first image in flash.
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0x2102 to 0x210f
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NVRAM for boot system commands, if NONE found it attemps to boot the first file in FLASH.
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crossover cable pin setup
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1-3
2-6 3-1 4-4 5-5 6-2 7-7 8-8 |
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rolled cable pin setup
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1-8
2-7 3-6 4-5 5-4 6-3 7-2 8-1 |
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consider upper layer protocols
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app, present and session layers
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five steps of data encapsulation
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1.user info is converted into bits
2.data is converted into segments 3.segments are converted into packets or datagrams 4.packets or datagrams are converted into frames 5. frames are converted into bits for transmission |
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aaddress classes
a,b,c |
a.0-127
b.128-191 c.192-223 |
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ISDN
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integrated services digital network
is a circuit switched connection, |
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the destination unreachable message type notifies source host that a receiving host or network is
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not available
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below is output of what command
1.sources of routing updates 2.networks being advertisied 3.update timer values |
show ip protocols
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acl id numbers
ip, extended and ipx standard |
standard-99
extended-100 standard ipx-888 |
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which tasks can be accomplished by using the command history feature
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set command history buffer size
recall previously entered commands |
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How does ICMP improve data transfer reliability in IP networks?
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ICMP error messages are returned to the sending device when a packet is dropped by a router.
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Which devices along a data transmission path are notified by ICMP when delivery failures occur?
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source devices only
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#
Which condition could cause a fragmentation needed ICMP destination unreachable message to be sent? |
A packet is forwarded from a Token Ring network to an Ethernet network.
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DEFAULT state of the interface on a router?
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administrativly down, line protocol down
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What will be the response from the router after the command, "router(config)# hostname portsmouth" is entered?
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portsmouth(config)#
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modes and interfaces that can be protected with passwords. (Choose three.)
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vty interface
console interface priviledged exec mode |
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Which basic components do a router and a standard desktop PC have in common? (Choose three.)
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cpu
input/output interfaces system bus |
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An internetwork must include which of the following? (Choose three.)
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switching
dynamica and static routing consistent end-to-end addressing |
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What is a teleradiology company do?
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Radiologists read images over the internet off of a PACS system. www.sheelimaging.com is an example of a teleradiology company
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