Computer Networks Final Exam

Which commands couldn't be used to check if DNS name resolution is working properly on a Windows PC?

• nslookaround cisco.com

• nslookup cisco.com

• nslookup 123.456.789.0

• ping cisco.com

• nslookup cisco

Given network 172.18.109.0, which subnet mask would be used if 6 host bits were available?

• 255.255.192.0

• 255.255.224.0

• 255.255.255.192

• 255.255.255.248

• 255.255.255.252

Which statement describes the characteristics of packet-filtering and stateful firewalls as they relate to the OSI model?

• A packet-filtering firewall can filter up to the application layer, whereas a stateful firewall can filter up to the transport layer.

• Packet-filtering firewalls operate exclusively at the network layer, while stateful firewalls can filter up to the physical layer.

• Packet-filtering firewalls are limited to the session layer, while stateful firewalls can filter up to the presentation layer.

• A packet-filtering firewall typically can filter up to the transport layer, whereas a stateful firewall can filter up to the session layer.

An engineer is issuing the login block-for 10 attempts 5 within 60 command on a router. Which threat is the network administrator trying to prevent?

• a user who is trying to guess a password to access the router

• preventing a user from accessing specific websites.

• blocking unauthorized access to network shares.

• mitigating phishing attempts targeting network users.

What type of IPv6 address is represented by ::1/128?

• Link-local

• Loopback

• Multicast

• Anycast

Which type of attack is being launched at Ciscoville?

• Phishing

• DoS

• Spoofing

• Man-in-the-Middle (MitM)

Which command is used to manually query a DNS server to resolve a specific host name?

• nslookup

• ping

• dnscheck

• dnstest

Given network 172.18.109.0, which subnet mask would be used if 10 host bits were available?

• 255.255.240.0

• 255.255.255.128

• 255.255.255.0

• 255.255.252.0

• 255.255.254.0

Which networking model is being used?

What service is provided by POP3?