View Full Cisco CCNP Security 300-730 Exam Dumps and Practice Test Dumps.

 

Question 101

Which Cisco VPN technology is designed to provide scalable hub-and-spoke VPN connectivity using dynamic tunnels?

1. DMVPN
2. MACsec
3. Cisco Umbrella
4. Port Security

Correct Answer: 1

Explanation

Dynamic Multipoint VPN, or DMVPN, is a Cisco VPN technology designed to simplify and scale hub-and-spoke VPN deployments. It uses technologies such as NHRP, multipoint GRE, and IPsec to allow spoke routers to dynamically discover other spokes and establish direct tunnels when required. This can reduce the need for manually configured point-to-point tunnels between every pair of sites. DMVPN is commonly used in large enterprise WAN environments where many branch offices need secure connectivity. MACsec provides Layer 2 protection, Umbrella provides cloud-delivered security services, and Port Security controls MAC addresses on switch interfaces.

Question 102

Which DMVPN protocol allows spoke routers to dynamically discover the addresses of other VPN peers?

1. IKE
2. NHRP
3. RADIUS
4. TACACS+

Correct Answer: 2

Explanation

Next Hop Resolution Protocol, or NHRP, is a key component of DMVPN. It allows a spoke to learn the NBMA address of another spoke dynamically through the hub. This information enables spokes to establish direct spoke-to-spoke tunnels instead of sending all traffic through the hub. NHRP therefore helps DMVPN scale efficiently when many remote sites participate in the VPN. IKE is used to negotiate IPsec security associations, while RADIUS and TACACS+ are AAA protocols. NHRP specifically performs the next-hop address resolution required for dynamic multipoint VPN operation.

Question 103

Which DMVPN phase introduced dynamic spoke-to-spoke tunnels while retaining a hub-and-spoke control structure?

1. Phase 1
2. Phase 2
3. Phase 3
4. Phase 0

Correct Answer: 2

Explanation

DMVPN Phase 2 allows spoke routers to establish direct spoke-to-spoke tunnels dynamically. The hub continues to provide NHRP services, but traffic between spokes can use direct paths rather than being forced through the hub. This can improve traffic efficiency and reduce unnecessary hub utilization. DMVPN Phase 1 primarily uses hub-and-spoke communication, while Phase 3 introduces additional improvements through NHRP redirect and shortcut mechanisms. Understanding DMVPN phases is important when designing scalable encrypted WAN connectivity because each phase has different routing and tunnel-establishment behavior.

Question 104

Which DMVPN feature allows a hub to inform a spoke that a more direct path to another spoke is available?

1. NHRP Redirect
2. DHCP Snooping
3. IKE Rekey
4. ARP Inspection

Correct Answer: 1

Explanation

NHRP Redirect is a feature associated with DMVPN Phase 3. When traffic initially travels through the hub toward another spoke, the hub can send an NHRP redirect message to inform the originating spoke that a more direct path is available. The spoke can then use NHRP to resolve the appropriate next-hop information and establish a more efficient spoke-to-spoke path. This mechanism helps DMVPN networks maintain scalable routing while allowing direct communication where appropriate. DHCP Snooping and ARP Inspection are Layer 2 security features, while IKE rekeying concerns IPsec security associations.

Question 105

Which component is primarily responsible for negotiating cryptographic parameters for an IPsec VPN?

1. ESP
2. IKE
3. MACsec
4. RADIUS

Correct Answer: 2

Explanation

Internet Key Exchange, or IKE, negotiates cryptographic parameters and establishes security associations between IPsec peers. During IKE negotiation, peers agree on parameters such as encryption algorithms, integrity algorithms, authentication methods, and key-exchange information. After successful negotiation, IPsec can use the resulting security associations to protect user traffic. ESP is responsible for protecting IP packets, while MACsec protects Ethernet frames at Layer 2. RADIUS is primarily an AAA protocol used for network access authentication. IKE is therefore the control-plane mechanism responsible for establishing the cryptographic relationship required by IPsec VPNs.

Question 106

Which authentication method is generally more scalable for large IPsec VPN deployments than manually configured pre-shared keys?

1. Digital certificates
2. Static ARP
3. MAC addresses
4. DHCP leases

Correct Answer: 1

Explanation

Digital certificates provide a scalable authentication mechanism for large IPsec VPN environments. Instead of manually configuring and maintaining a separate shared secret for many peers, organizations can use a PKI infrastructure where certificates are issued and validated through trusted certificate authorities. This simplifies identity management and can support large numbers of VPN devices. Pre-shared keys can work well in smaller deployments but become difficult to manage as the number of peers increases. Static ARP, MAC addresses, and DHCP leases do not provide the cryptographic peer authentication mechanism required for scalable certificate-based IPsec deployments.

Question 107

Which Cisco VPN technology provides encrypted group communication using a centralized key-management approach?

1. Remote-access SSL VPN
2. GETVPN
3. Port Security
4. Cisco Umbrella

Correct Answer: 2

Explanation

Cisco Group Encrypted Transport VPN, or GETVPN, is designed for securing group communications across an enterprise network. Unlike traditional point-to-point IPsec VPNs, GETVPN can preserve the original IP addressing and routing information while applying encryption to traffic between group members. A Key Server distributes and manages security policies and keys for group members. This architecture is particularly useful for organizations with large private WAN environments where many sites need secure any-to-any communication. Remote-access SSL VPN is intended for individual users, while Port Security and Umbrella provide unrelated network security functions.

Question 108

In a GETVPN deployment, which device is responsible for distributing encryption keys and security policies to group members?

1. Spoke Router
2. Key Server
3. RADIUS Server
4. Certificate Authority

Correct Answer: 2

Explanation

The GETVPN Key Server is responsible for distributing group security policies and cryptographic keys to registered group members. Group members use these policies to encrypt and decrypt traffic according to the configured GETVPN architecture. This centralized key-management approach helps simplify the administration of large-scale group encryption deployments. A RADIUS server is generally used for AAA functions, while a Certificate Authority manages certificates within a PKI environment. In GETVPN, the Key Server has the specific role of maintaining and distributing the information required for group members to securely communicate.

Question 109

Which IPsec feature helps protect against replay attacks by tracking packet sequence numbers?

1. NAT
2. Replay protection
3. URL Filtering
4. DNS Security

Correct Answer: 2

Explanation

IPsec replay protection helps detect and reject packets that are retransmitted by an attacker or delivered outside the expected sequence. ESP uses sequence numbers together with a replay window to determine whether received packets are acceptable. If an attacker captures a valid encrypted packet and attempts to resend it, the receiving device can identify the packet as a duplicate or invalid sequence and discard it. Replay protection is an important part of IPsec security because encryption alone does not prevent an attacker from retransmitting previously captured valid traffic. NAT, URL filtering, and DNS security address different security requirements.

Question 110

Which VPN deployment is primarily intended to allow individual users to securely access corporate resources from remote locations?

1. Remote-access VPN
2. Site-to-site VPN
3. GETVPN
4. MACsec

Correct Answer: 1

Explanation

A remote-access VPN is designed for individual users who need secure access to organizational resources from locations outside the corporate network. A VPN client, such as Cisco Secure Client, can establish an encrypted connection to a VPN gateway and provide authenticated access according to organizational policies. Site-to-site VPNs instead connect entire networks or security gateways. GETVPN is designed for group-based enterprise network encryption, while MACsec provides Layer 2 Ethernet protection. Remote-access VPNs are commonly used by employees working from home, traveling, or connecting from other external locations.

Question 111

Which Cisco Secure Client capability is commonly used to establish remote-access VPN connections?

1. AnyConnect VPN
2. DHCP Snooping
3. MACsec
4. NHRP

Correct Answer: 1

Explanation

Cisco Secure Client provides remote-access VPN functionality that enables users to establish secure connections to supported Cisco VPN gateways. The VPN capability evolved from Cisco AnyConnect and provides encrypted connectivity, authentication, and policy enforcement for remote users. Depending on the deployment, administrators can also use Secure Client for additional endpoint security capabilities. DHCP Snooping is a switch security feature, MACsec protects Layer 2 Ethernet traffic, and NHRP is associated with dynamic VPN architectures such as DMVPN. Secure Client is therefore the appropriate endpoint software for many Cisco remote-access VPN deployments.

Question 112

Which IPsec component defines the cryptographic algorithms used to protect data in a traditional Cisco IPsec configuration?

1. Transform set
2. DHCP pool
3. Security group tag
4. DNS record

Correct Answer: 1

Explanation

A traditional Cisco IPsec transform set defines the encryption and integrity algorithms used to protect IPsec traffic. Depending on the configuration and platform, transform sets can specify combinations such as encryption with an integrity algorithm. The transform set is associated with IPsec policies and helps determine how protected traffic is processed. DHCP pools provide IP addressing, security group tags support identity-based segmentation, and DNS records provide name-resolution information. Understanding transform sets is particularly important when working with traditional crypto-map-based IPsec configurations and troubleshooting mismatched VPN parameters between peers.

Question 113

Which configuration element traditionally associates an IPsec VPN policy with traffic that should be encrypted?

1. Crypto map
2. VLAN database
3. DHCP binding
4. AAA method list

Correct Answer: 1

Explanation

A crypto map traditionally defines and associates IPsec VPN parameters with traffic that should be encrypted on Cisco IOS devices. It can identify the remote peer, specify the traffic to protect through an access control list, reference the transform set or IPsec proposal, and define other VPN parameters. The crypto map is then applied to the appropriate interface. VLAN databases, DHCP bindings, and AAA method lists serve different purposes. Crypto-map-based IPsec remains important for understanding traditional Cisco VPN configurations, although newer platforms and architectures may use different policy-based or profile-based mechanisms.

Question 114

Which configuration mechanism identifies the traffic that should be protected by a traditional policy-based IPsec VPN?

1. Access control list
2. DHCP Snooping table
3. MAC address table
4. DNS cache

Correct Answer: 1

Explanation

In traditional policy-based Cisco IPsec configurations, an access control list can define the interesting traffic that should be encrypted. The ACL identifies the source and destination networks or hosts that should use the VPN. Traffic matching the crypto ACL is processed according to the associated IPsec configuration. The ACL therefore plays an important role in determining which traffic enters the encrypted tunnel. DHCP Snooping tables contain IP-to-MAC bindings, MAC address tables map Layer 2 addresses to interfaces, and DNS caches store name-resolution information. The crypto ACL should be carefully matched between VPN peers to ensure proper tunnel operation.

Question 115

Which VPN component can provide a logical grouping of remote-access VPN users and associated policies on Cisco security appliances?

1. Tunnel group
2. VLAN trunk
3. DHCP binding
4. MAC address table

Correct Answer: 1

Explanation

A tunnel group on Cisco security appliances can define parameters associated with a specific remote-access VPN connection group. It can be used to identify authentication settings, address pools, group policies, and other VPN-related parameters depending on the platform and configuration. This allows administrators to apply different policies to different classes of remote users. VLAN trunks transport traffic for multiple VLANs, DHCP bindings associate addresses with clients, and MAC address tables support Layer 2 forwarding. Tunnel groups are therefore an important concept when configuring and organizing remote-access VPN services on supported Cisco security platforms.

Question 116

Which IPsec protocol provides integrity and authentication but does not provide encryption?

1. ESP
2. AH
3. IKEv2
4. RADIUS

Correct Answer: 2

Explanation

Authentication Header, or AH, provides integrity and authentication for IP packets but does not provide confidentiality through encryption. AH can help verify that packets have not been modified and that they originate from an authenticated source. ESP is more commonly used in modern VPN deployments because it can provide encryption as well as integrity and authentication. IKEv2 negotiates IPsec security associations rather than directly protecting application traffic, while RADIUS provides AAA services. AH also has limitations when network address translation is involved, which is one reason ESP is generally preferred for contemporary IPsec VPN implementations.

Question 117

Which technology allows network devices to use security group tags to enforce identity-based segmentation?

1. Cisco TrustSec
2. NAT
3. NHRP
4. DNS

Correct Answer: 1

Explanation

Cisco TrustSec provides identity-based access control and segmentation using Security Group Tags, commonly called SGTs. Instead of relying solely on IP addresses or VLANs, TrustSec can associate users and devices with security group information and use those identities to enforce policy. SGTs can be propagated through supported network infrastructure and used by policy enforcement points. NAT translates addresses, NHRP supports dynamic VPN peer discovery, and DNS provides name resolution. TrustSec is particularly useful in environments where organizations need scalable segmentation based on user or device identity rather than only physical network location.

Question 118

Which AAA protocol is commonly preferred for centralized network administrator authentication and command authorization?

1. RADIUS
2. TACACS+
3. DHCP
4. NHRP

Correct Answer: 2

Explanation

TACACS+ is commonly used for centralized authentication, authorization, and accounting of network administrators. One important advantage is its support for granular command authorization, allowing organizations to control which administrative commands individual users can execute. TACACS+ also separates authentication and authorization functions and encrypts the entire body of the protocol communication. RADIUS is widely used for network access authentication such as 802.1X. DHCP provides IP configuration, while NHRP supports dynamic VPN address resolution. TACACS+ is therefore particularly suited to centralized administrative access control for network infrastructure.

Question 119

Which mechanism can help a Cisco VPN endpoint verify whether a certificate has been revoked?

1. OCSP
2. ARP
3. DHCP
4. NAT

Correct Answer: 1

Explanation

Online Certificate Status Protocol, or OCSP, allows systems to query the status of a digital certificate and determine whether it has been revoked. Certificate revocation checking is important because a certificate may become untrusted before its normal expiration date, such as when a private key is compromised. Another commonly used mechanism is a Certificate Revocation List, or CRL, which contains revoked certificate information. OCSP can provide more current status information through an online query. ARP, DHCP, and NAT are unrelated to certificate validation. Certificate status checking is an important component of secure PKI-based VPN authentication.

Question 120

Which security mechanism allows a VPN device to obtain certificates automatically from a certificate authority using a standardized enrollment process?

1. SCEP
2. SNMP
3. FTP
4. Telnet

Correct Answer: 1

Explanation

Simple Certificate Enrollment Protocol, or SCEP, is commonly used to automate certificate enrollment between network devices and a certificate authority. It can simplify the process of requesting and obtaining certificates for VPN gateways, routers, and other devices participating in PKI-based authentication. Automated enrollment becomes particularly valuable in large environments where manually generating and installing certificates on every device would be difficult to maintain. SNMP is primarily used for monitoring and management, FTP is a file-transfer protocol, and Telnet provides remote terminal access without modern encryption. SCEP therefore supports scalable certificate deployment for security infrastructures.