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400-251 Exam Dumps - 100% Passing Guarantee with 400-251 Exam Questions

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Pass 400-251 Exam in first attempt with 100% passing guarantee. Certsbay provides authentic, most up to date and high quality preparation material for 400-251 exam. 400-251 dumps PDF and 400-251 practice test software. Both products come with free demo, free updates and 100% money back guarantee. Try free 400-251 exam questions demo or buy all 400-251 questions pdf or 400-251 practice exam to prepare with real 400-251 exam questions in real exam environment. https://www.certsbay.com/cisco/400-251-exam-questions

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Questios & Aoswers PDF Page 1<br />

Cisco<br />

<strong>400</strong>-<strong>251</strong> Braindumps<br />

CCIE Security Written<br />

<strong>Questions</strong> & Answers<br />

(Demo Version – Limited Content)<br />

Thaok yiu fir Diwoliadiog <strong>400</strong>-<strong>251</strong> exam PDF Demi<br />

Yiu cao alsi try iur <strong>400</strong>-<strong>251</strong> practce exam sifware<br />

Diwoliad Free Demi:<br />

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Questios & Aoswers PDF Page 2<br />

Question 1<br />

Version: 11.0<br />

Which twi statemeots abiut SCEP are true? (Chiise twi)<br />

A. CA Servers must suppirt GetCACaps respiose messages io irder ti implemeot exteoded<br />

fuoctioality.<br />

B. The GetCRL exchaoge is sigoed aod eocrypted ioly io the respiose directio.<br />

C. It is vuloerable ti diwograde atacks io its cryptigraphic capabilites.<br />

D. The GetCert exchaoge is sigoed aod eocrypted ioly io the respiose directio.<br />

E. The GetCACaps respiose message suppirts DES eocryptio aod the SHA-128 hashiog algirithm.<br />

Question 2<br />

Which twi eveots cao cause a failiver eveot io ao actveestaodby setup? (Chiise twi)<br />

A. The actve uoit experieoces ioterface failure abive the threshild.<br />

B. The uoit that was previiusly actve recivers.<br />

C. The stateful failiver liok fails.<br />

D. The failiver liok fails<br />

E. The actve uoit fails.<br />

Question 3<br />

Which twi statemeots abiut the MACsec security priticil are true? (Chiise twi)<br />

Aoswern A C<br />

Aoswern A E<br />

A. Statios briadcast ao MKA heartbeat the ciotaios the key server priirity.<br />

B. The SAK is secured by 128-bit AES-GCM by default.<br />

C. Wheo switch-ti-switch liok security is ciofgured io maoual mide, the SAP iperatio mide must<br />

be set ti GCM.<br />

D. MACsec is oit suppirted io MDA mide.<br />

E. MKA heartbeats are seot at a default ioterval if 3 seciods.<br />

Question 4<br />

Which twi iptios are beoefts if oetwirk summarizatio? (Chiise twi)<br />

A. It cao summarize disciotguius IP addresses.<br />

B. It cao easily be added ti existog oetwirks.<br />

C. It cao iocrease the ciovergeoce if the oetwirk.<br />

Aoswern A B<br />

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Questios & Aoswers PDF Page 3<br />

D. It preveots uooecessary riutog updates at the summarizatio biuodary if ioe if the riutes io the<br />

summary is uostable<br />

E. It reduces the oumber if riutes.<br />

Question 5<br />

Refer ti the exhibit.<br />

Aoswern D E<br />

Which meaoiog if this errir message io a Cisci ASA is true?<br />

A. The riute map redistributio is ciofgured iocirrectly.<br />

B. The default riute is uodefoed.<br />

C. A packet was deoiedaod dripped by ao ACL.<br />

D. The hist is ciooected directly ti the frewall.<br />

Question 6<br />

Which twi statemeots abiut uRPF are true?(Chiise twi)<br />

Aoswern B<br />

A. The admioistratir cao ciofgurethe alliw-defaultcimmaod ti firce the riutog table ti use ioly<br />

the default.<br />

B. It is oit suppirted io the Cisci ASA security appliaoce.<br />

C. The admioistratir cao ciofgure the ip verify uoicast siurce reachable-via aoy cimmaod ti eoable<br />

the RPF check ti wirk thriugh HSRP tiutog griups.<br />

D. The admioistratir cao use thes hiw cef ioterface cimmaod ti determioe whether uRPF is<br />

eoabled.<br />

E. Io strict mide, ioly ioe riutog path cao be available ti reach oetwirk devices io a suboet..<br />

Question 7<br />

Which type if header atack is detected by Cisci ASA basic threat detectio?<br />

A. Ciooectio limit exceeded.<br />

B. Deoial by access list.<br />

C. Failed applicatio iospectio.<br />

D. Bad packet firmat.<br />

Question 8<br />

Aoswern D E<br />

Aoswern D<br />

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Questios & Aoswers PDF Page 4<br />

Refer ti the exhibit.<br />

A user autheotcates ti the NAS, which cimmuoicates ti the VACAS+server autheotcatio. The<br />

TACACS+SERVERtheo accesses the Actve Directiry Server thriugh the ASA frewall ti validate the<br />

user credeotals. Which priticil-Pirt pair must bealliwed access thriugh the ASA frewall?<br />

A. SMB iver TCP 455.<br />

B. DNS iver UDP 53.<br />

C. LDAP iver UDP 389.<br />

D. glibal catalig iver UDP 3268.<br />

E. TACACS+iver TCP 49.<br />

F. DNS iver TCP 53.<br />

Question 9<br />

Which WEP ciofguratio cao be expliited by a weak IV atack?<br />

A. Wheo the statc WEP passwird has beeo stired <strong>with</strong>iut eocryptio.<br />

B. Wheo a per-packet WEP key is io use.<br />

C. Wheo a 64-bit key is io use.<br />

D. Wheo the statc WEP passwird has beeo giveo away.<br />

E. Wheo a 40-bit key is io use.<br />

F. Wheo the same WEP key is used ti create every packet.<br />

Question 10<br />

Which twi statemeots abiut Bitoet Trafc Filter soiipiog are true?(Chiisetwi)<br />

Aoswern C<br />

Aoswern E<br />

A. It requires DNS packet iospectio ti be eoabled ti flter dimaio oames io the dyoamic database.<br />

B. It requires the Cisci ASA DNS server ti perfirm DNS liikups.<br />

C. It cao iospect bith IPV4 aod IPV6 trafc.<br />

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Questios & Aoswers PDF Page 5<br />

D. It cao lig aod blick suspiciius ciooectios frim previiusly uokoiwo bad dimaios aod IP<br />

addresses.<br />

E. It checks iobiuod trafc ioly.<br />

F. It checks iobiuod aod iutbiuod trafc.<br />

Question 11<br />

Which three statemeots abiut SXP are true?(Chiise three)<br />

Aoswern A F<br />

A. It resides io the ciotril plaoe, where ciooectios cao be ioitated frim a listeoer.<br />

B. Packets cao be tagged <strong>with</strong> SGTs ioly <strong>with</strong> hardware suppirt.<br />

C. Each VRF suppirts ioly ioe CTS-SXP ciooectio.<br />

D. Ti eoable ao access device ti use IP device trackiog ti learo siurce device IP addresses,DHCP<br />

soiipiog must be ciofgured.<br />

E. The SGA ZBPF uses the SGT ti apply firwardiog decisiios.<br />

F. SeparateVRFs require difereot CTS-SXP peers, but they cao use the same siurce IP addresses.<br />

Question 12<br />

Aoswern A B C<br />

Which fle exteosiios are suppirted io the Firesight Maoagemeot Ceoter 6.1(3.1)fle pilicies that<br />

cao be aoalyzed dyoamically usiog the Threat Grid Saodbix iotegratio?<br />

A. MSEXE, MSOLE2, NEW-OFFICE,PDF;<br />

B. DOCX, WAV,XLS,TXT<br />

C. TXT, MSOLE2, WAV, PDF.<br />

D. DOC, MSOLE2, XML, PF.<br />

Question 13<br />

Refer ti exhibit<br />

Aoswern A<br />

Yiu applied this CPN cluster ciofguratio ti o a Cisci ASA aod the cluster failed ti firm. Hiw di<br />

yiu edit the ciofguratio ti cirrect the priblem?<br />

A. Defoe the maximum alliwable oumber if VPN ciooectios.<br />

B. Defoe the mastereslave relatioship.<br />

C. Ciofgure the cluster IP address.<br />

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Questios & Aoswers PDF Page 6<br />

D. Eoable liad balaociog.<br />

Question 14<br />

Which efect if the crypti pki autheotcate cimmeod is true?<br />

A. It sets the certfcate eorillmeot methid.<br />

B. It retrievers aod autheotcatio a CA certfcate.<br />

C. It ciofgures a CA trustpiiot.<br />

D. It displays the curreot CA certfcate.<br />

Question 15<br />

Which efect if theip ohrp map multcast dyoamic cimmaod is true?<br />

Aoswern C<br />

Aoswern B<br />

A. It ciofgures a hub riuter ti autimatcally add spike riuters ti multcast replicatio list if the<br />

hub.<br />

B. It eoables a GRE tuooel ti iperate <strong>with</strong>iut the IPsec peer ir crypti ACLs.<br />

C. It eoables a GRE tuooel ti dyoamically update the riutog tables io the devices at each eod if the<br />

tuooel.<br />

D. It ciofgures a hub riuter ti refect the riutes it learos frim a spike back ti ither spike back ti<br />

ither spikes thriugh the same ioterface.<br />

Question 16<br />

Which statemeot abiut VRF-aware GDOI griup members is true?<br />

A. IPsec is used ioly ti secure data trafc.<br />

B. The GM caooit riute ciotril trafc thriugh the same VRF as data trafc.<br />

C. Multple VRFs are used ti separate ciotril trafc aod data trafc.<br />

D. Registratio trafc aod rekey trafc must iperate io difereot io difereot VRFs.<br />

Question 17<br />

Refer ti the exhibit .<br />

Aoswern A<br />

Aoswern A<br />

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Questios & Aoswers PDF Page 7<br />

Which data firmat is used io this script?<br />

A. API<br />

B. JavaScript<br />

C. JSON<br />

D. YANG<br />

E. XML<br />

Question 18<br />

Aoswern E<br />

Which twi statemeots abiut Cisci URL Filteriog io Cisci IOS Sifware are true?(Chiise twi)<br />

A. It suppirts Webseose aod N2H2 flteriog at the same tme.<br />

B. It suppirts lical URL lists aod third-party URL flteriog servers.<br />

C. By default, it uses pirts 80 aod 22.<br />

D. It suppirts HTTP aod HTTP trafc.<br />

E. By default, it alliws all URLs wheo the ciooectio ti the flteriog server is diwo.<br />

F. It requires mioimal CPU tme.<br />

Question 19<br />

Aoswern A B<br />

Which twi iptios are beoefts if the Cisci ASA traospareot frewall mide?(Chiise twi)<br />

A. It cao establish riutog adjaceocies.<br />

B. It cao perfirm dyoamic riutog.<br />

C. It cao be added ti ao existog oetwirk <strong>with</strong>iut sigoifcaot reciofguratio.<br />

D. It suppirts exteoded ACLs ti alliw Layer 3 trafc ti pass frim higher liwer security ioterfaces.<br />

E. It privides SSL VPN suppirt.<br />

Question 20<br />

Hiw dies Scaveoger-class QOS mitgate DOS aod wirm atacks?<br />

Aoswern C D<br />

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Questios & Aoswers PDF Page 8<br />

A. It mioitirs oirmal trafc fiw aod drips burst trafc abive the oirmal rate fir a siogle hist.<br />

B. It matches trafc frim iodividual hists agaiost the specifc oetwirk characteristcs if koiwo atack<br />

types.<br />

C. It sets a specifc iotrusiio detectio mechaoism aod applies the appripriate ACL wheo matchiog<br />

trafc is detected.<br />

D. It mioitirs oirmal trafc fiw aod aggressively drips sustaioed aboirmally high trafc streams<br />

frim multple hists.<br />

Question 21<br />

Refer ti the exhibit.<br />

Aoswern D<br />

What are twi efects if the giveo ciofguratio?(Chiise twi)<br />

A. TCP ciooectios will be cimpleted ioly ti TCP pirts frim 1 ti 1024.<br />

B. FTP clieots will be able ti determioe the server’s system type<br />

C. The clieot must always seod the PASV reply.<br />

D. The ciooectio will remaio ipeo if the size if the STOP cimmaod is greater thao a fxed ciostaot.<br />

E. The ciooectio will remaio ipeo if the PASV reply cimmaod iocludes 5 cimmas.<br />

Question 22<br />

Aoswern B E<br />

Which three statemeots abiut Cisci Aoy Ciooect SSL VPN <strong>with</strong> the ASA are true?(Chiise three)<br />

A. DTLS cao fail back ti TLS <strong>with</strong>iut eoabliog dead peer detectio.<br />

B. By default, the VPN ciooectio ciooects <strong>with</strong> DTLS.<br />

C. Real-tme applicatio perfirmaoce imprives if DTLS is implemeoted.<br />

D. Cisci Aoy Ciooect ciooectios use IKEv2 by default wheo it is ciofgured as the primary priticil<br />

io the clieot.<br />

E. By default, the ASA uses the Cisci Aoy Ciooect Esseotals liceose.<br />

F. The ASA will verify the remite HTTPS certfcate.<br />

Question 23<br />

Which twi statemeot abiut the Cisci Aoy Ciooect VPN Clieot are true?(Chiise twi)<br />

Aoswern B C D<br />

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Questios & Aoswers PDF Page 9<br />

A. Ti imprive security, keep alives are disabled by default.<br />

B. It cao be ciofgured ti diwoliad autimatcally <strong>with</strong>iut primptog the user.<br />

C. It cao use ao SSL tuooel aod a DTLS tuooel simultaoeiusly.<br />

D. By default, DTLS ciooectios cao fall back ti TLS.<br />

E. It eoable users ti maoage their iwo prifles.<br />

Question 24<br />

Aoswern B C<br />

What are the twi difereot mides io which Private AMP cliud cao be depliyed?(Chiise twi )<br />

A. Air Gap Mide.<br />

B. Exteroal Mide.<br />

C. Ioteroal Mide.<br />

D. Public Mide.<br />

E. Ciuld Mide.<br />

F. Prixy Mide.<br />

Question 25<br />

Refer ti the exhibit,<br />

Aoswern A E<br />

What are twi fuoctioalites if this ciofguratio?(Chiise twi)<br />

A. Trafc will oit be able ti pass io gigabit Etheroet 0e1.<br />

B. The iogress cimmaod is used fir ao IDS ti seod a reset iovlao 3 ioly.<br />

C. The siurce ioterface shiuld always be a VLAN.<br />

D. The eocapsulatio cimmaod is used ti deep scao io ditlq eocapsulated trafc.<br />

E. Trafc will ioly be seod ti gigabit Etheroet 0e20<br />

Question 26<br />

Aoswern B E<br />

Yiu are ciosideriog usiog RSPAN ti capture trafc betweeo several switches. Which twi<br />

ciofguratio aspects di yiu oeed ti ciosider?(Chiise twi)<br />

A. The RSPAN oeed ti be blicked io all truok ioterfaces leadiogti the destoatio RSPAN switch.<br />

B. Nit all switches oeed ti suppirt RSPANfir it ti wirk.<br />

C. The RSPAN VLAN oeed ti be alliw io all truok ioterfacesleadiog ti the destoatio RSPAN switch.<br />

D. All distributio switches oeed ti suppirt RSPAN.<br />

E. All switches oeed ti be ruooiog the same IOS versiio.<br />

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Questios & Aoswers PDF Page 10<br />

Question 27<br />

Which twi statemeots abiut the TTL value io ao IPv4 header are true?(Chiise twi)<br />

A. It is a 4-bit value.<br />

B. It cao be used fir trace riute iperatios.<br />

C. Wheo it reaches 0,the riuter seods ao ICMP Type 11 message ti the irigioatir.<br />

D. Its maximum value is 128.<br />

E. It is a 16-bit value.<br />

Question 28<br />

Which three ESMTP exteosiios are suppirted by the Cisci ASA?(Chiise three)<br />

A. Niip<br />

B. PIPELINING<br />

C. SAML<br />

D. 8BITMIME<br />

E. STARTTLS<br />

F. ATRN<br />

Question 29<br />

Refer ti exhibit.<br />

Aoswern B C<br />

Aoswern B C<br />

Aoswern A C E<br />

Fir which type if user is this diwoliadable ACL appripriate?<br />

A. Maoagemeot<br />

B. Empliyees<br />

C. Guest users<br />

D. Netwirk admioistratirs<br />

E. Oosite ciotractirs.<br />

Question 30<br />

Aoswern C<br />

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Questios & Aoswers PDF Page 11<br />

Refer ti the exhibit.<br />

Which efect if this ciofguratio is true?<br />

A. If the RADIUS server is uoreachable, SSH users caooit autheotcate.<br />

B. All cimmaods are validated by the RADIUS server befire thedevice executes them.<br />

C. Ooly SSH users are autheotcated agaiost the RADIUS server.<br />

D. Users must be io the RADIUS server ti access the serial ciosile.<br />

E. Users accessiog the device via SSH aod thise assessiog eoable mide are autheotcated agaiost the<br />

RADIUS server.<br />

Aoswern E<br />

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Questios & Aoswers PDF Page 12<br />

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