Cisco 350-701 - Implementing and Operating Cisco Security Core Technologies (SCOR 350-701 v2.0)

Explanation

The ASA and ASASM implementations of NetFlow Secure Event Logging (NSEL) provide a stateful, IP flow tracking method that exports only those records that indicate significant events in a flow.

The significant events that are tracked include flow-create, flow-teardown, and flow-denied (excluding those flows that are denied by EtherType ACLs).

The RAT (Recipient Access Table) is the list that contains the allowed recipient addresses on the Cisco ESA. The RAT controls whether the ESA accepts or rejects messages to a recipient address based on the sender group and the mail policy. The RAT can be configured to allow, relay, or reject messages to specific recipients or domains. The RAT can also be used to apply different message filters or content filters to different recipient groups12. References: 1: Implementing and Operating Cisco Security Core Technologies (SCOR) course, Module 2: Network Security, Lesson 3: Deploying Cisco Email Security Appliance, Topic: Configuring Mail Policies2: Cisco Email Security Appliance User Guide, Release 13.5 - Configuring Mail Policies [Cisco Secure Email Gateway] - Cisco.

A NetFlow version 9 template record is a record that contains information about the fields that will be present in the data records that follow the template. A template record consists of a template ID, a field count, and a list of field types and lengths. A template record is sent periodically by the NetFlow exporter to the NetFlow collector, so that the collector can parse and interpret the data records correctly. A template record can also be requested by the collector using an options template record. The purpose of a template record is to define the format of data records, which contain the actual information about the IP flows1234.

A. It specifies the data format of NetFlow processes. - This is incorrect, because a template record does not specify the data format of NetFlow processes, but rather the data format of data records. NetFlow processes are the functions that perform flow creation, aggregation, export, and analysis on the NetFlow device or the collector. B. It provides a standardized set of information about an IP flow. - This is incorrect, because a template record does not provide any information about an IP flow, but rather the information about the fields that will be present in the data records. The data records are the ones that provide the information about an IP flow, such as source and destination IP addresses, ports, protocols, bytes, packets, timestamps, and so on. C. It defines the format of data records. - This is correct, because a template record defines the format of data records by specifying the field types and lengths that will be present in the data records. A template record allows the NetFlow collector to parse and interpret the data records correctly, and also enables the NetFlow exporter to use different formats for different types of flows. D. It serves as a unique identification number to distinguish individual data records. - This is incorrect, because a template record does not serve as a unique identification number, but rather as a description of the fields. A template record has a template ID, which is a 16-bit value that identifies the template record uniquely within an export packet, but this ID is not used to distinguish individual data records. The data records are distinguished by their position within the export packet and their association with a template record.

References := 1: NetFlow Version 9 Flow-Record Format [IP Application Services] - Cisco … 2: NetFlow V9 formats - IBM 3: Netflow :: Version 9 - Caligare 4: NetFlow Versions > NetFlow for Cybersecurity | Cisco Press

A PAC file is a Proxy Auto-Configuration file that contains a JavaScript function that determines whether web browser requests go directly to the destination or are forwarded to a web proxy server. A PAC file allows the client desktop browsers to be configured to select when to connect direct or when to use the proxy based on the URL and the host name. A PAC file can be downloaded from a web server or a local file. A PAC file is more suitable for complex proxy configurations or multiple proxy servers12

A transparent mode is a proxy configuration where the client browsers do not need to be configured to use the proxy. The proxy intercepts the traffic and forwards it to the destination. A transparent mode does not allow the client browsers to select when to connect direct or when to use the proxy34

A forward file is not a valid proxy configuration method.

A bridge mode is a network configuration where a device connects two or more network segments and forwards traffic between them. A bridge mode is not a proxy configuration method5 References := 1: Proxy Auto-Configuration (PAC) file - HTTP | MDN 2: Proxy auto-config - Wikipedia 3: Explicit and Transparent Proxy - techdocs.broadcom.com 4: Configure Explicit Proxy - Palo Alto Networks | TechDocs 5: config web-proxy explicit | FortiGate / FortiOS 7.4.0

Endpoint Detection and Response (EDR) continuously records endpoint activity, applies behavioral analytics to suspicious actions, supports investigation, and enables response actions such as isolating or remotely containing a compromised host. This provides visibility into previously unknown or zero-day behavior while integrating automated prevention and response for known threats. An Endpoint Protection Platform can block known malware, but pairing it only with host intrusion detection does not provide the complete behavioral investigation and remote-containment capability stated. Offline antivirus updates emphasize signature maintenance and cannot deliver live investigation or console-driven containment. A Secure Email Gateway protects the email channel and can sandbox attachments, but it does not monitor and contain general endpoint activity. Therefore, EDR with behavioral analytics and remote containment is the only solution satisfying all parts of the requirement. Cisco EDR overview

The script implements the OAuth 2.0 client-credentials flow. HTTPBasicAuth supplies the client ID and client secret to the Secure Access token endpoint, while BackendApplicationClient and OAuth2Session construct the machine-to-machine authorization request. The call to fetch_token() posts to https://api.sse.cisco.com/auth/v2/token and returns the token response, which contains an OAuth access token and related metadata. GetToken() returns that response, and the final print() statement displays it after the Token: prefix. Cisco’s API documentation identifies this endpoint as the Secure Access Token Authorization endpoint and states that it generates an API access token using the client-credentials flow. The URL and client secret are inputs to the request, not the resulting authorization credential, and “endpoint token” is not the documented output. Therefore, the expected output is an access token. Cisco Secure Access API authentication guide

The decisive message is TS_UNACCEPTABLE, followed by “Traffic selector negotiation failed.” During IKEv2 CHILD_SA creation, the peers negotiate traffic selectors defining the protected local and remote address ranges. RFC 7296 defines TS_UNACCEPTABLE as indicating that the proposed traffic selectors are unacceptable. The displayed encryption, integrity, and PFS parameters do not produce an algorithm-rejection notification; Phase 1 has already completed, and the failure occurs while negotiating selectors for the CHILD_SA. The engineer must make the protected-network definitions complementary on both FTD peers—for example, one peer’s local network must equal the other peer’s remote network, with compatible masks. Changing AES, extending the IKE lifetime, or removing the PFS group does not correct mismatched encryption domains. RFC 7296—IKEv2

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Cisco ISE uses probes to collect endpoint attributes that are used in profiling. Probes are software modules that run on the ISE Policy Service Nodes (PSNs) and gather information about the endpoints connected to the network. Probes can use various protocols and methods to collect endpoint attributes, such as RADIUS, DHCP, SNMP, HTTP, DNS, NetFlow, NMAP, Active Directory, and Cisco pxGrid. The collected attributes are then matched to predefined or custom conditions that define the endpoint profiles. Endpoint profiling enables ISE to identify and classify the endpoints and apply the appropriate policies based on their identity, role, and context12. References: 1: Cisco ISE 2.4 Endpoint Profiling - Cisco 2: How To Create an Endpoint Profile - Cisco Community

The login block-for command sets a limit on the maximum number of failed login attempts allowed within a defined period of time. If this limit is exceeded, no further logins are allowed for the specified period of time. This feature is designed to protect the router from denial-of-service and dictionary attacks. The syntax of the command is as follows:

login block-for < block-time-period > attempts < fail-attempts > within < login-attempt-time-period >

The  < block-time-period >  parameter specifies the duration of the quiet period in seconds. The  < fail-attempts >  parameter specifies the number of failed attempts that trigger the quiet period. The  < login-attempt-time-period >  parameter specifies the time window in seconds for counting the failed attempts.

In this question, the command login block-for 100 attempts 4 within 60 means that if four failures occur in 60 seconds, the router goes to quiet mode for 100 seconds. During the quiet period, no login attempts are accepted, and the router responds with the message “Login disabled for < block-time-period > seconds due to too many failed login attempts.” After the quiet period expires, the router resumes normal login operations.

The other options are incorrect because they do not match the command syntax or the expected behavior of the login block-for feature.

References :=

Some possible references for this question are:

User Security Configuration Guide - Cisco IOS Login Enhancements-Login Block

Configuring Login Block

Restrict login attempts : login block-for command

When applied to a router, which command would help mitigate brute-force password attacks against the router?

Explanation

Dynamic ARP inspection (DAI) is a security feature that validates ARP packets in a network. It intercepts, logs, and discards ARP packets with invalid IP-to-MAC address bindings. This capability protects the network from certain man-in-the-middle attacks. After enabling DAI, all ports become untrusted ports.

Explanation

To understand DHCP snooping we need to learn about DHCP spoofing attack first.

DHCP spoofing is a type of attack in that the attacker listens for DHCP Requests from clients and answers them with fake DHCP Response before the authorized DHCP Response comes to the clients. The fake DHCP Response often gives its IP address as the client default gateway - > all the traffic sent from the client will go through the attacker computer, the attacker becomes a “man-in-the-middle”.

The attacker can have some ways to make sure its fake DHCP Response arrives first. In fact, if the attacker is “closer” than the DHCP Server then he doesn’t need to do anything. Or he can DoS the DHCP Server so that it can’t send the DHCP Response.

DHCP snooping can prevent DHCP spoofing attacks. DHCP snooping is a Cisco Catalyst feature that

determines which switch ports can respond to DHCP requests. Ports are identified as trusted and untrusted.

Only ports that connect to an authorized DHCP server are trusted, and allowed to send all types of DHCP

messages. All other ports on the switch are untrusted and can send only DHCP requests. If a DHCP response

is seen on an untrusted port, the port is shut down.

Explanation

Explanation

Cisco FTD devices, Cisco Firepower devices, and the Cisco ASA FirePOWER modules can be managed by

the Firepower Management Center (FMC), formerly known as the FireSIGHT Management Center - > Answer D

is not correct

Explanation

CoA Messages are sent on two different udp ports depending on the platform. Cisco standardizes on UDP port

1700, while the actual RFC calls out using UDP port 3799.

GETVPN and IPsec are both VPN technologies that use ESP (Encapsulating Security Payload) to encrypt and authenticate data packets. However, they differ in the following aspects:

GETVPN uses a group IPSec security paradigm, which means that all group members share the same IPSec SA (Security Association) and can communicate with each other without having to establish point-to-point tunnels. IPsec, on the other hand, uses a pair-wise IPSec security paradigm, which requires each pair of devices to negotiate and maintain their own IPSec SAs and tunnels.

GETVPN uses GDOI (Group Domain of Interpretation) as a key management protocol, which allows a Key Server (KS) to distribute the encryption keys and policies to all group members. IPsec uses IKE (Internet Key Exchange) as a key management protocol, which involves two phases of negotiation between each pair of devices to establish the IPSec SAs.

GETVPN supports multicast traffic without the need for GRE (Generic Routing Encapsulation) tunneling, as it preserves the original IP header of the packet. IPsec does not support multicast traffic natively, and requires GRE tunneling to encapsulate the multicast packets with a new IP header.

GETVPN relies on the underlying WAN routing to deliver the encrypted packets to the destination, as it does not create any overlay routing. IPsec creates an overlay routing, which may introduce additional latency and complexity.

References :=

Some possible references are:

[Implementing and Operating Cisco Security Core Technologies (SCOR) v1.0], Module 6: Secure Connectivity, Lesson 6.2: Implementing Site-to-Site VPNs, Topic 6.2.2: Group Encrypted Transport VPN

Group Encrypted Transport VPN (GETVPN)

GETVPN - Cisco Community

Cisco Get VPN vs DMVPN: Difference and Comparison

What is a difference between GETVPN and IPsec?

Explanation

Diffie Hellman (DH) uses a private-public key pair to establish a shared secret, typically a symmetric key. DH is not a symmetric algorithm – it is an asymmetric algorithm used to establish a shared secret for a symmetric key algorithm.