CCIE SP Written Exam (Version 3.0)
Number: 350-029
Passing Score: 790
Time Limit: 120 min
File Version: 421Q+69
QUESTION 1
Which three modes are the operating of HDLC? (Choose three)
A. asynchronous balanced mode (ABM)
B. normal response mode (NRM)
C. normal peer mode (NPM)
D. asynchronous client mode (ACM)
E. asynchronous response mode (ARM)
Correct Answer: ABE
HDLC Operational Modes
HDLC offers three different modes of operation. These three modes of operations are:
Normal Response Mode(NRM)
Asynchronous Response Mode(ARM)
Asynchronous Balanced Mode(ABM)
Normal Response Mode
This is the mode in which the primary station initiates transfers to the secondary station. The secondary station can only transmit a response when, and only when, it is instructed to do so by the primary station. In other words, the secondary station must receive explicit permission from the primary station to transfer a response. After receiving permission from the primary station, the secondary station initiates it's transmission. This transmission from the secondary station to the primary station may be much more than just an acknowledgment of a frame. It may in fact be more than one information frame. Once the last frame is transmitted by the secondary station, it must wait once again from explicit permission to transfer anything, from the primary station. Normal Response Mode is only used within an unbalanced configuration.
Asynchronous Response Mode
In this mode, the primary station doesn't initiate transfers to the secondary station. In fact, the secondary station does not have to wait to receive explicit permission from the primary station to transfer any frames. The frames may be more than just acknowledgment frames. They may contain data, or control information regarding the status of the secondary station. This mode can reduce overhead on the link, as no frames need to be transferred in order to give the secondary station permission to initiate a transfer. However some limitations do exist. Due to the fact that this mode is Asynchronous, the secondary station must wait until it detects and idle channel before it can transfer any frames. This is when the ARM link is operating at half-duplex. If the ARM link is operating at full-duplex, the secondary station can transmit at any time. In this mode, the primary station still retains responsibility for error recovery, link setup, and link disconnection.
Asynchronous Balanced Mode
This mode uses combined stations. There is no need for permission on the part of any station in this mode. This is because combined stations do not require any sort of instructions to perform any task on the link.
Normal Response Mode is used most frequently in multi-point lines, where the primary station controls the link. Asynchronous Response Mode is better for point to point links, as it reduces overhead. Asynchronous Balanced Mode is not used widely today.
The "asynchronous" in both ARM and ABM does not refer to the format of the data on the link. It refers to the fact that any given station can transfer frames without explicit permission or instruction from any other station.
QUESTION 2
IP over DWDM management models (Choose two.)
A. Segmented Management
B. Integrated Management
C. Virtual Transponder
D. Traffic Management
Correct Answer: AB
QUESTION 3
Which three of these are optical channel data unit (ODU) overhead fields? (Choose three)
A. general communication channel 0 (GCC0)
B. section monitoring
C. reserved (RES)
D. general communication channels 1 and 2 (GCC1 GCC2)
E. tandem connection monitoring activation deactivation (TCM ACT)
Correct Answer: CDE
QUESTION 4
What is one of the primary overhead fields associated with the Optical Payload Unit (OPU)?
A. path monitoring
B. tandem connection monitoring activation deactivation (TCM ACT)
C. Payload Structure Identifier (PSI)
D. multiframe alignment signal (MFAS)
E. section monitoring
Correct Answer: C
QUESTION 5
In optical channel transport unit overhead (OTU OH), what are general communication channels 1 and 2 (GCC1/GCC2) used for?
A. for trail trace identification
B. as the backward defect indicator
C. to transmit information between OTU termination points
D. to extend command and management functions over several frames
E. General communication channels 1 and 2 (GCC1/GCC2) do not belong to OTU OH.
Correct Answer: E
QUESTION 6
What is the minimum hardware configuration of the multishelf Cisco CRS-1 system?
A. One route processor (RP) card and one modular services card (MSC)
B. One distributed route processor (DRP) and one S13 fabric card (SFC)
C. One line card chassis (LCC) and one fabric card chassis (FCC)
D. One route processor (RP) and one fabric card chassis (FCC)
E. One line card chassis (LCC) and one S13 fabric card (SFC)
Correct Answer: C
QUESTION 7
Cisco IOS XR software is partitioned into three planes: control, data, and management. Which three of these belong to the data plane? (Choose three.)
A. XML
B. RIB
C. FIB
D. QoS
E. PFI
Correct Answer: CDE
QUESTION 8
Which statement about Software Maintenance Upgrade is true?
A. CRS-1 SMU can be applied to a different platform, and vice versa.
B. SMU is an executable code for running a process or libraries that are shared between the different processes.
C. SMUs for each release are individually downloadable from Cisco.com and come in the form of a tar ball.
D. SMUs provide software fixes for critical network down and qualification blocking issues.Therefore, every software defect has a corresponding SMU.
E. SMUs are release-specific. If an issue affects multiple platforms or releases, an SMU is built separately for each release and each platform.
Correct Answer: E
QUESTION 9
Cisco IOS XR has implemented a nonstop routing feature so that when RP failover occurs, the routing information can be recovered locally. Which protocol does
not support the NSR feature?
A. OSPF
B. LDP
C. BGP
D. IS-IS
E. RSVP
Correct Answer: E
QUESTION 10
Which three components are included in the Cisco IOS XR infrastructure? (Choose three.)
A. modular line cards
B. shelf controllers
C. route processors
D. service processors
E. distributed service cards
Correct Answer: BCD
QUESTION 11
All secure domain routers (SDRs) have shared attribute and resources. Which three resources are shared all SDRs? (Choose three.)
A. privilege-level configuration
B. fabric cards
C. SNMP traps
D. admin-level configuration
E. exec-level configuration
Correct Answer: BCD
:QUESTION 12
Which three statements about the secure domain router are true? (Choose three.)
A. The logical router can span across chassis.
B. The fabric and system controller module are shared by all logical routers.
C. Each logical router has a distinct fabric and system controller module
D. The logical router can share a route processor
E. The logical router cannot share a route processor.
Correct Answer: ABE
QUESTION 13
There are two cabling schemes to choose from when implementing a Cisco CRS-1 multi shelf system: single module cabling and multi module cabling. What is the
maximum capacity of the LCCs that are supported in multi module cabling?
A. 9 LCCs
B. 7 LCCs
C. 10 LCCs
D. 6 LCCs
E. 8 LCCs
Correct Answer: A
QUESTION 14
Process-level redundancy is implemented by a system manager process that creates the standby process. What two functions are provided by the system-level
process called Qnet Symlink Manager (QSM)? (Choose two.)
A. backing up the information for the broken connections
B. provides common information for connecting processes and services
C. detection of a failed connection
D. provides an abstract name for a process or service
E. distribution of symbolic link information
Correct Answer: DE
:QUESTION 15
When will the primary processor core dump run in case of a switchover?
A. never takes place
B. periodically
C. during switchover
D. after switchover
E. before switchover
Correct Answer: D
QUESTION 16
CRS-1 single shelf maximum capacities?
A. 320 Gbit/s
B. 640 Gbit/s
C. 1.2 Tbit/s
D. 92 Tbit/s
Correct Answer: C
QUESTION 17
Which of the following processes in IOS XR run exclusively on the Route Processor? (Choose two.)
A. wdsysmon
B. mpls_idp
C. sysmgr
D. gsp
E. bgp
Correct Answer: BE
QUESTION 18
Refer to the exhibit.
Which router is the DIS?
A. router-22
B. router-44
C. router-33 and router-44
D. router-11
E. router-33
Correct Answer: E
QUESTION 19
What three major tasks are performed by a Designated Intermediate System in an ISIS pseudonode
environment? (Choose three.)
A. updating the pseudonode LSP
B. maintaining pseudonode link-state information
C. creating the pseudonode LSP
D. flooding LSPs over the LAN
E. election of the pseudonode
Correct Answer: ACD
QUESTION 20
What bit should be set in the link state PDUs in an IS-IS level-1-2 router to indicate that they are a potential exit point out of the area?
A. ATT (Attached) bit
B. ABR (Area Border Rorter) bit
C. PN (Pseudonode) bit
D. P (Partition) bit
E. Down bit
F. IS-Type bit
Correct Answer: A
QUESTION 21
The Attribute field within the IS-IS LSP header contains which of the following flags? (Choose four)
A. IS-Type
B. Overload (LSPDBOL)
C. Pseudonode (PN)
D. Attached (ATT)
E. Fragment (Frag-Nr)
F. Partition (P)
Correct Answer: ABDF
QUESTION 22
Refer to the exhibit. Your customer has enabled IPv6 and IPv4 on routers R1 and R2, both running ISIS routing protocol, and they can no longer reach R3 network
172.26.15.0/24 (R3 does not enable IPv6, enables IPv4 only). Which two steps should be taken to restore reach ability to R3? (Choose two.)
A. Enable OSPFv3 to support IPv4 and IPv6 simultaneously.
B. Configure static routes to all unreachable networks and redistribute to IS-IS.
C. Create an IPv6 tunnel from R2 to R3.
D. Transition to IS-IS Multiple Topology Mode on R3.
E. Enable wide metrics.
F. Transition to IS-IS Multiple Topology Mode on R1 and R2.
Correct Answer: EF
QUESTION 23
What ISIS TLVs are used to support MPLS Traffic Engineering? (Choose three).
A. Extended IS neighbor TLV #22
B. Extended IS name TLV #137
C. Extended IS resource TLV #138
D. Extended IS reachability TLV #135
E. Router ID TLV #134
Correct Answer: ADE
QUESTION 24
How do routers in an IS-IS Level-1 domain exit to reach other Level-1 domains? (Choose two.)
A. Level-1 routers use default routes announced by Level-2 routers in Level-1 domain
B. Level-1 routers use default routes installed based on ATT bit (Attach Bit) in announcements from Level-1-2 router
C. Level-1 routers use specific routes, for other Level-1 domain, announced by Level-1-2 router by route leaking feature of Cisco IOS
D. Level-1 routers use specific routes, for other Level-1 domain, announced by Level-2 router by route-leaking feature of Cisco IOS
Correct Answer: BC
QUESTION 25
In the IS-IS Designated Intermediate System (DIS) election process, which criteria is used for DIS selection?
A. highest router ID first, then highest priority
B. highest MAC address first, then highest priority
C. highest router ID first, then highest MAC address
D. highest priority first, then highest router ID
E. highest priority first, then highest MAC address
Correct Answer: E
QUESTION 26
What is periodically multicasted (every 10 seconds) by the DIS on a LAN to ensure IS-IS Link State Database accuracy?
A. IIH
B. LSP
C. CSNP
D. ISH
E. PSNP
Correct Answer: C
QUESTION 27
Which two statements regarding the IS-IS DIS election process are true? (Choose two.)
A. L1 routers on a broadcast network only establish adjacencies with the DIS.
B. If the DIS becomes unavailable the backup DIS is promoted to DIS.
C. Adding a router with a higher priority than the current DIS will result in the new router becoming DIS.
D. Separate L1 and L2 election processes are held on a brodcast network.
E. A priority of 0 will prevent a router from becoming a DIS.
F. If there is a tie based on priority, the router whose attached interface has the lowest MAC address becomes the DIS.
Correct Answer: CD
QUESTION 28
What is the importance of using Virtual Output Queues on ingress Line Cards in a high-end router?
A. Increases forwarding performance
B. Simplifies configuration
C. Prevents head-of-line blocking
D. Uses less memory
Correct Answer: C
QUESTION 29
What is the default SPF throttle timer in OSPF?
A. 5s
B. 10ms
C. 0ms
D. 30s
E. 1s
F. 500ms
Correct Answer: A
QUESTION 30
Which OSPF LSA is used to support MPLS Traffic-Engineering?
A. NSSA LSA (Type 7)
B. Opaque LSA (Type 11)
C. Opaque LSA (Type 9)
D. Opaque LSA (Type 10)
E. External LSA (Type 5)
Correct Answer: D
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