Exam (elaborations)
CCTC Networking actual Exam questions and answers 2025 latest update.
- Course
- Institution
CCTC Networking actual Exam questions and answers 2025 latest update.
[Show more]
Content preview
CCTC Networking actual Examquestions and answers 2025
latest update.
Ethernet header fields - answer - Destination MAC: ether[0:6]
- Source MAC: ether[5:6]
- Ethertype: ether[12:2] (w/o VLAN)
- VLAN tag: ether[12:4]
Common ethertypes - answer - 0x0800: IPv4
- 0x86DD: IPv6
- 0x0806: ARP
IPv4 header - answer - Version: ip[0] & 0xF0
- IHL: ip[0] & 0x0F
- DSCP: ip[1] & 0xFC
- ID: ip[4:2]
- TTL: ip[8]
- Protocol: ip[9]
- Flags: ip[6] & 0xE000
- Source IP: ip[12:4]
- Dest IP: ip[16:4]
IPv6 header - answer - Next header: ip6[6]
TCP header - answer - Source port: tcp[0:2]
- Dest port: tcp[2:2]
,- Flags: tcp[13]; CWR, ECE, URG, ACK, PSH, RST, SYN, FIN
Protocol codes - answer - TCP: 6
- UDP: 17
- ICMP: 1
ICMP type/codes - answer - Echo reply: 0/0
- Echo request: 8/0
- Time Exceeeded: 11
- Destination unreachable: 3
Default TTLs - answer - Linux: 64
- Windows: 128
- Cisco: 255
Scapy - answer - Interactive packet maniputlation tool, packet
sniffer, network scanner, packet generator
Legal TCP flag combinations - answer - Ack
- Syn
- Syn ack
- Fin ack
- Rst ack
Types of social engineering - answer - Pretexting: pretending to be
someone you are not; impersonation
- Reciprocity: provide something for something
- Scarcity: running out of time to get something; limited time offer
- Authority: the right to exercise power
, - Social proof: convince the target to take a certain action
- Sympathy:
Scanning tools - answer - nmap: run with root priv; ARP packets;
open raw sockets; OS best guest
- netcat: nc -vwz <IP> <ports>
- scapy
- ping sweep: icmp; FW and OS can block packet, making scan
unreliable
TCP Connect Scan - answer - 3 way handshake is completed
- Logged scan
TCP SYN (half-open) scan - answer - badguy: sends SYN
- target (if open): SYNACK
- target (if closed): RST
- badguy:sends RST => target port stays open
- if target is filtered: no response
ACK Scan - answer - Solicits stateful firewall
- Open or closed ports return RST flag => unfiltered
- No response => filtered
UDP Scans - answer - Do not create connection
- Can bypass TCP stateful firewalls
Stealth scans - answer - Don't create connection
- NULL, XMAS and FIN scans
- Open: No response, Closed: RST
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller GUARANTEEDSUCCESS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79789 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now