H12-261 MCQs
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H12-261 Exam Questions
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HCIE-R&S (Written) (Expert -Routing & Switching) 2026
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The IS-IS authentication functions include interface authentication, area authentication, and routing domain authentication.
TRUE
FALSE
What can be said of TTL Propagation when IP propagation has been disabled (MPLS)? (Multiple Choice)
The TTL field of the MPLS label header is set to 255 on the ingress LER.
The TTL value of the IP header will not be reduced on the LSP. "
The TTL field of the packet is set to 0.
TTL propagation is only disabled in the ingress edge LSR.
TTL propagation cannot be disabled in MPLS domain.
The following figure shows the topology of a multi-protocol network. Router R4 in Area 1 imports routes learned through BGP to the OSPF processes. What types of LSAs will R3 generate and advertise to Area 0? (Multiple Choice)
Type 4 - ASBR Summary LSAs
Type 5 - AS External LSAs
Type 1 - Router LSAs
Type 7 - NSSA AS-extemal-LSAs
Type 2 - Network LSAs
CAR has been configured on router HW1. What best defines Committed Access Rate (CAR)?
CAR allows metering of traffic for traffic shaping.
CAR is a feature that allows the rate limiting of traffic in either the incoming or outgoing direction.
CAR is part of a set of features to be used in conjunction with queuing to form a hierarchical policy. CAR must always be applied in a parent policy-map, whereas CBWFQ should be applied in a child policy-map.
CAR is a queuing feature.
CAR matches only on UDP port range [16384 - 32767].
A company has deployed SSM on its network. To reduce bandwidth consumption of multicast data on the LAN, the network administrator configures the following commands on the S5700 switch: [Quidway]igmp-snooping enable [Quidway]vlan 10 [Quidway-vlanlOJigmp-snooping enable [Quidway-vlanlfJ]igmp-snooping version 3 The S5700 switch then forwards data packets based on groups that hosts have joined.
TRUE
FALSE
Serial 0 on a router is an OSPF network in area 1. You configure serial 0 as silent. What is the effect of this configuration change?
OSPF will accept the routing updates from neighbors.
OSPF will form all the available adjacencies on that interface.
OSPF will not insert any of the learned routes in the local routing table.
OSPF will not form any adjacencies on that interface.
ICMPv6 uses the type field to identify packet types. Based on values of the type field, ICMPv6 packets are classified into two types: error packets and information packets.
TRUE
FALSE
An IS-IS neighbor relationship can be established on a P2P network as long as Hello packets are exchanged twice.
TRUE
FALSE
If a Gigabit Ethernet port receive buffer becomes full on a LAN switch, what protocol can be used to request that the remote port delay sending frames for a specified time?
A. 802.1U B. 802.3Z C. 802.1D D. 802.3
E. 802.3AF
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