350-023 - CCIE Service Provider WAN Switching Recertification Exam
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What statement is true concerning Frame Relay UNI LMI?
LMI is not carried across the network and has local significance only.
What command must be executed in order to ensure that configuration images will be saved cleanly?
savecnf clear *
The load model:
Is a static measurement of loading on trunks based on the minimum packets per second
What is the total length of a Frame Relay header without extended addressing?
What network is a supernet?
When using Frame Relay service interworking, what is true when building a connection?
One side uses native Frame Relay (IETF) and the far side uses native ATM with SNAP or NLPID encapsulation.
In the internet core, routers communicating over ATM typically use:
The time of day on the BPX command screen is determined by:
The time of day on the lowest-numbered node
A Permanent Virtual Path (PVP) connection switches cells by looking at the:
Which pins are controlled by the DTE device?
RTS, TXD, DTR, XTC
When using Frame Relay network interworking, what is true for the Switch that performs the Interworking Function?
One side expects frames and the other side expects Frame Relay frames segmented into ATM cells (FR-SSCS).
Which are the correct ways to release IBGP from the condition that all IBGP neighbors need to be fully meshed? (Select two.)
Configure route reflectors
What is NOT a reason to deploy MPLS?
Ubiquitous acceptance and firm standards
What situation would never cause an FRP port communication failure by itself?
Setting the port to not use LMI.
If two time-stamped FastPackets fit into one ATM cell, how many bytes will be allocated to header overhead?
While entering commands on a console, the break key is pressed accidentally and the router reboots. What action could disable this problem?
Change the configuration register.
What is true about the DLCI field in the Frame Relay header?
It generally has significance only between the local switch and the DTE device.
The purpose of Administrative Distance, as used by Cisco routers, is:
To choose between routes from different routing protocols when receiving updates for the same network.
OSPF is defined on a Frame Relay interface providing point-to-point connections. The remote neighbors can reach this central site, but are complaining of routing failures between each of the remote sites. The central router has all the routers for each remote site. Based on this information, what can be diagnosed as the biggest potential problem?
There is an incorrect selection of the Designated Router
In PNNI networks, AESA has the following general format:
13-byte network prefix, a 6-byte End System Identifier plus 1 byte Selector
Intelligent Packet Discard Methods work on what premise?
That the cells come from large packets, segmented
What is the purpose of using a null timing (dejitter buffer)?
To smooth out any artificial gaps in the traffic before delivering the bits to the CPE device
What ISDN timer is started after Q.931 SETUP msg is sent?
What is an advantage of cell technology?
Cell technology simplifies the hardware/software architecture allowing for faster switching fabrics.
Select the group of technologies which are listed in descending order of bandwidth scale:
DWDM, SDH, FrameRelay
The network administrator has forgotten the enable password of the router. Luckily, no one is currently logged into the router, but all passwords on the router are encrypted. What should the administrator do to recover the enable password?
Reboot the router, press the BREAK key during bootup, and boot the router into ROM Monitor mode to erase the configuration, and re-install the entire configuration as it was saved on a TFTP server
In order to avoid loops when sending routing updates, what is the correct technique to prevent a network from being forwarded on the same interface it is learned?
Which compression technique provides near toll quality sound using 8kbps?
Code Excited Linear Predictor
If a Dialer Profile exists in the local configuration of a router, what is true?
None of the above
What is the overhead required to encapsulate a 100-byte Frame Relay frame into FastPackets?
None of the above
What is the advantage(s) of B8ZS over ZCS on a DS1 facility?
B8ZS ensures the line's density and ZCS does not
What establishes routing table precedence in a routing table?
The CLP can be set to 1:
By the switch to inform the ATM network that this cell is not conforming and MAY be discarded.
By the CPE to tell the switch that this cell has lower priority.
Which are valid combinations?
All of the above
When connected to a T1 ISDN line from a PBX, how can the on-hoof/off-hook status be monitored on a CDP/CVM?
It is not possible to observe the on-hook/off-hook for this configuration.
Which mechanism maximize "Goodput?"
Early Packet Discard - EPD
Both VPI and VCI have only local significance.
With VAD set, a utilization rate of 40%, and 16K ADPCM set, how many voice channels can be routed on a T1 trunk?
More than 200
A network administrator is using debug commands to check the performance of a network. What steps can the administrator take to ensure that the "debug" will not require too much CPU, or at least that she will not have to reboot the router to disable debug? (Multiple answer)
Make the debug command as specific as possible
Configure a loopback to channel debug traffic
Which bits or sets of bits are not found in a Frame Relay header?
Committed Information Rate
The usage control parameter (UPC):
Protects the network and its service guarantees from sources which violate their traffic contract
Both VPI and VCI have only local significance.
What is not true concerning ATM to FR Service interworking?
In the ATM to FR direction, it the EFCI field in the first cell of a segmented frame received is set to 'congestion experienced,' then FECN is set to 'congestion experienced.'
What is Forwarding Equivalence Class assignment NOT likely to be based upon?
How would a Central Office telephone switch instruct a D4 channel bank to ring an analog phone?
The central office telephone switch toggles the A/B bits in the direction of the CPE
Regarding PNNI, what statement is true?
PNNI needs ILMI in order to discover the Peer Node
A fast Ethernet connection supporting multiple VLANs is referred to as:
If the Frame Relay switch receives data from the CPE device above the configured CIR, frames will be discarded:
When the rate exceeds Bc + Be
MPLS traffic engineering routing information is carried by:
OSPF Opaque LSAs or IS-IS TLVs
Which statements are true?
On a bidirectional allocation scheme, one peer will allocate ODD VCIs and the other EVEN VCIs.