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Dual-stack approach refers to:
a. Implementing IPv4 with two stacks
b. Implementing IPv6 with two stacks
c. Node has both IPv4 and IPv6 support
d. Implementing a MAC address with two stacks
Answer: csanfoundry+1
Which of the following is NOT a transition strategy used between IPv4 and IPv6?
a. Dual stack
b. Tunneling
c. Conversion
d. Header translation
Answer: csanfoundry+1
The key purpose of deploying dual-stack in networking is:
a. Supporting only IPv4 addresses
b. Supporting only IPv6 addresses
c. Ensuring simultaneous support of both IPv4 and IPv6
d. Converting IPv4 addresses to IPv6
Answer: cwebasha+1
Dual-stack devices must have which type(s) of addresses configured on their interfaces?
a. Only IPv4
b. Only IPv6
c. Both IPv4 and IPv6
d. No IP addresses
Answer: cjuniper+1
When a dual-stack device queries a DNS server, which information does it use to decide which IP version to send?
a. MAC address
b. DNS A or AAAA record
c. Port number
d. Subnet mask
Answer: bsanfoundry+1
Which transition technique encapsulates IPv6 packets in IPv4 for transit across IPv4 networks?
a. Dual stack
b. Tunneling
c. Header translation
d. Address translation
Answer: bsanfoundry+1
Dual-stack is most commonly used during which network phase?
a. Only IPv4 deployment
b. Only IPv6 deployment
c. IPv4-to-IPv6 transition period
d. WLAN deployment
Answer: ctestbook+1
Carrier-grade NAT (CGN) is often used alongside dual-stack to:
a. Expand IPv4 public addresses
b. Eliminate IPv6 addresses
c. Communicate with MAC addresses
d. Configure only static routes
Answer: ajuniper
In dual-stack networking, the decision for which stack to use is driven by:
a. ARP table
b. DNS response
c. MAC address resolution
d. Router configuration
Answer: bsanfoundry+1
Which term best describes a device capable of originating and processing both IPv4 and IPv6 packets?
a. NAT device
b. Dual-stack device
c. IPv4-only host
d. IPv6 tunneler
Answer: bitexamanswers+1
What is an advantage of dual-stack deployment?
a. No requirement for IPv6
b. Seamless interoperability for IPv4 and IPv6
c. Only supports private IPs
d. Only supports static routing
Answer: bwebasha+1
Dual stack is sometimes avoided due to:
a. Network overhead
b. Higher administrative costs
c. Requirement for two address spaces
d. All the above
Answer: djuniper+1
In dual-stack networks, IPv4 address depletion can be mitigated by:
a. Using NAT solutions
b. Removing IPv6
c. Using only IPv4
d. Expanding the DHCP pool
Answer: ajuniper
A dual-stack router typically requires:
a. Only IPv4 interfaces
b. IPv6-capable hardware only
c. Separate configurations for both IPv4 and IPv6
d. No interface configuration
Answer: ctestbook+1
Which record type in DNS is essential for dual-stack operation?
a. MX
b. A and AAAA
c. NS
d. TXT
Answer: bsanfoundry+1
Dual-stack operation provides network applications with:
a. Automatic translation of protocols
b. Choice between IPv4 and IPv6 per endpoint
c. Only IPv4 functionality
d. Only IPv6 functionality
Answer: bjuniper
In the dual-stack model, address translation is handled by:
a. NAT
b. DHCP
c. ARP
d. DNS
Answer: atestbook+1
During dual-stack deployment, network devices usually:
a. Default to IPv4 connections
b. Try IPv6 and fallback to IPv4 if unavailable
c. Use only IPv6 tunnels
d. Discard IPv4 packets
Answer: bitexamanswers+1
A major reason for the industry’s shift from IPv4 to IPv6 through dual-stack is:
a. Exhaustion of available IPv4 addresses
b. IPv4 speed limitations
c. MAC address limitations
d. Subnet mask length issues
Answer: aitexamanswers+1
Which of the following enables IPv4 and IPv6 to operate on the same network infrastructure?
a. Multicast routing
b. Dual stack
c. Static routing
d. Access control lists
Answer: bwebasha+1
In dual-stack, which address type is typically assigned to each network interface?
a. Only 32-bit address
b. Only 128-bit address
c. Both 32-bit (IPv4) and 128-bit (IPv6) addresses
d. No address at all
Answer: csanfoundry+1
Dual-stack implementation is most suitable for which category of organizations?
a. Enterprises migrating to IPv6
b. Small offices using only IPv4
c. Networks using only NAT
d. Organizations not connected to the internet
Answer: ajuniper
In dual-stack networks, communication between IPv6-only devices and IPv4-only devices requires:
a. Dual-stack gateway or translation
b. Direct IPv6 routing
c. VPN configuration
d. Only multicast support
Answer: atestbook+1
The main disadvantage of dual-stack at scale is:
a. Increased CPU requirement
b. Higher memory usage due to maintaining two address spaces
c. Increased cable requirements
d. Decreased bandwidth
Answer: bwebasha+1
Dual-stack networks require coordination with which protocol for DHCP services?
a. Only DHCPv4
b. Only DHCPv6
c. Both DHCPv4 and DHCPv6
d. NTP
Answer: cjuniper
Which addressing technique is used in access networks for dual-stack when no public IPv4 address is available?
a. NAT44
b. NAT64
c. DS-Lite
d. 6rd
Answer: cjuniper
Dual-stack can be deployed alongside which other transition technologies?
a. Tunneling
b. NAT64 translation
c. DS-Lite
d. All the above
Answer: dtestbook+1
On dual-stack devices, which method determines whether to use IPv4 or IPv6 when communicating?
a. Manual configuration only
b. DNS responses and protocol preference
c. ARP table lookups
d. MAC address type
Answer: bsanfoundry+1
The dual-stack approach helps protect against:
a. IPv4 compatibility loss during transition
b. IPv6-only networking issues
c. Security vulnerabilities
d. VLAN misconfigurations
Answer: atestbook+1
Dual-stack deployment is considered:
a. Permanent for all organizations
b. Temporary during IPv4-to-IPv6 migration
c. Not usable in modern networks
d. An obsolete strategy
Answer: bwebasha+1
Why is dual-stack needed for cloud and IoT devices?
a. They require only IPv6
b. Legacy IPv4 devices need support
c. Devices must communicate over both protocols for compatibility
d. Cloud platforms disallow IPv4
Answer: cjuniper
The IP version used in dual-stack networks is dependent upon:
a. Source device only
b. DNS records and network configuration
c. ISP assignment only
d. Subnet mask length only
Answer: bjuniper
The most scalable IPv4-to-IPv6 transition method is generally considered:
a. Dual stack
b. NAT
c. Tunneling
d. Proxy routing
Answer: atestbook+1
Dual-stack operation may require which changes to network firewall policies?
a. No changes at all
b. Rules for both IPv4 and IPv6 traffic
c. Only IPv4 updates
d. Disabling firewalls
Answer: bjuniper
Which type of routing protocol is often preferred for dual-stack networks?
a. Single-stack protocols only
b. Dual-protocol capable, e.g., OSPFv2 for IPv4 and OSPFv3 for IPv6
c. Static routing only
d. RIP v1 only
Answer: bjuniper
When troubleshooting dual-stack networks, which should be checked first?
a. DNS response types
b. ARP tables
c. Unused MAC addresses
d. Printer configurations
Answer: asanfoundry+1
Dual-stack design helps network administrators:
a. Limit protocol flexibility
b. Facilitate gradual migration and interoperability
c. Constrain network expansions
d. Limit IP address allocations
Answer: bwebasha+1
When both communicating devices are dual-stack, which protocol is preferred?
a. IPv4 always
b. IPv6 if available
c. Either, depending on DNS and configuration
d. MAC protocol
Answer: csanfoundry+1
In dual-stack, which ISP strategy helps conserve IPv4 addresses?
a. Expanding IPv4 lease pool
b. Carrier-grade NAT (CGN)
c. Reducing IPv6 assignments
d. Dynamic DNS only
Answer: bjuniper
Dual-stack can be considered as what type of solution for address exhaustion?
a. Final solution
b. Intermediate solution until full IPv6 adoption
c. Non-solution
d. Works only for small networks
Answer: bwebasha+1
Dual-stack routers handle routing for:
a. Only IPv4
b. Only IPv6
c. Both IPv4 and IPv6
d. Only multicast traffic
Answer: ctestbook+1
What is the most challenging aspect of dual-stack transition for network operators?
a. Hardware upgrades
b. Managing two separate sets of traffic rules and policies
c. Lack of IPv6 support
d. Incompatibility with firewall logging
Answer: bjuniper
Dual-stack operation transparently allows users to:
a. Choose between IPv4 and IPv6 connectivity
b. Use only IPv4
c. Use only IPv6
d. Block both protocols
Answer: asanfoundry+1
NAT64 and DS-Lite are commonly used with dual-stack to:
a. Translate IPv6 packets to IPv4 and vice versa
b. Prevent edge security
c. Promote TCP-only routing
d. Disconnect legacy systems
Answer: atestbook+1
In a dual-stack network, an interface lacking IPv6 assignment will:
a. Only send IPv4 packets
b. Reject all traffic
c. Forward packets using tunnel protocols
d. Default to MAC-level routing
Answer: aitexamanswers+1
Which network layer is directly impacted when implementing dual-stack?
a. Data link
b. Network layer (Layer 3)
c. Transport layer
d. Application layer
Answer: bjuniper
For dual-stack deployment, what is recommended for local network addressing?
a. Assign global unicast IPv6 along with private IPv4, using NAT for IPv4 externally
b. Assign only global IPv4
c. Assign only global IPv6
d. Use APIPA address for IPv6
Answer: ajuniper
Dual-stack may be complicated by:
a. Devices/software only supporting one protocol version
b. Devices supporting both protocols
c. Unlimited public IP assignment
d. Automatic firewall rule creation
Answer: awebasha+1
IPv6-only servers can still be reached from dual-stack clients if:
a. NAT64 or translation technology is deployed
b. No translation, only IPv4 routing
c. DHCPv6 server is disabled
d. Static routes are deleted
Answer: atestbook+1
One major security consideration of dual-stack transition is:
a. Separate, parallel vulnerability exposure for both IPv4 and IPv6
b. Elimination of all risks
c. VPN only requirement
d. MAC spoofing is mandatory
Answer: awebasha+1

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