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| Section | Objectives |
|---|---|
| Topic 1: Application Security | - Secure software configuration - Container and service security |
| Topic 2: Cryptography | - OpenSSL usage and configuration - Public key infrastructure (PKI) - Data encryption and signing |
| Topic 3: Vulnerability Assessment and Monitoring | - Log analysis and auditing - Intrusion detection systems (IDS) |
| Topic 4: Security Administration | - System hardening - Authentication mechanisms |
| Topic 5: Network Security | - Secure network services - VPN technologies - Firewalls (iptables, nftables) |
| Topic 6: Access Control | - SELinux and AppArmor - Discretionary Access Control (DAC) - Mandatory Access Control (MAC) |
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NEW QUESTION # 114
In an IPsec implementation using strongSwan, what is the purpose of the Internet Key Exchange (IKE) protocol?
Answer: D
Explanation:
The Internet Key Exchange (IKE) protocol is used to negotiate and establish Security Associations (SAs) between two IPsec peers, including agreeing on the cryptographic algorithms to use and securely deriving the shared keys used to protect the actual traffic. IKE operates in two phases: Phase 1 establishes a secure channel between peers (the ISAKMP SA), and Phase
2 negotiates the actual IPsec SAs used to protect data traffic. The data itself is encrypted using the algorithms negotiated via IKE, not by IKE directly.
NEW QUESTION # 115
Which Linux kernel feature restricts a process's access to a subset of system calls, commonly used by container runtimes and sandboxing tools to reduce attack surface?
Answer: C
Explanation:
Secure Computing Mode (seccomp) is a Linux kernel feature that allows a process to restrict the set of system calls it is permitted to make, typically by loading a filter (often defined using BPF) that allows, denies, or traps specific syscalls. This significantly reduces a process's attack surface by preventing it from invoking syscalls it does not need, and is widely used by container runtimes like Docker and by sandboxing frameworks. cgroups control resource usage, namespaces provide isolated views of system resources, and capabilities divide root privileges into discrete units.
NEW QUESTION # 116
Which of the following DNS record types can the command dnssec-signzone add to a zone?
(Choose THREE correct answers.)
Answer: B,D,E
NEW QUESTION # 117
Which of the following terms refer to existing scan techniques with nmap?
(Choose TWO correct answers.)
Answer: B,D
NEW QUESTION # 118
Which mount option prevents the execution of binaries located on the mounted filesystem?
Answer: C
Explanation:
The noexec mount option prevents any binary or script located on that filesystem from being executed directly. This is commonly applied to filesystems such as /tmp or removable media to reduce the risk of malicious code execution. nosuid disables the effect of the setuid and setgid bits on that filesystem, nodev prevents device files from being interpreted as such, and ro mounts the filesystem as read-only, none of which specifically block execution of binaries.
NEW QUESTION # 119
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